| 168 | 168 | 1 | 0 |
| 170 | 170 | 1 | 0 |
| 1774 | 1774 | 0 | 1 |
| 20 | 20 | 1 | 0 |
| 24 | 24 | 1 | 0 |
| 313 | 313 | 1 | 0 |
| 360 | 360 | 1 | 0 |
| 378 | 378 | 1 | 0 |
| 47 | 47 | 1 | 0 |
| 57 | 57 | 1 | 0 |
| 59 | 59 | 1 | 0 |
| 60 | 60 | 4 | 0 |
| 66 | 66 | 6 | 0 |
| 7 | 7 | 0 | 1 |
| 70 | 70 | 1 | 0 |
| 79 | 79 | 1 | 0 |
| 86 | 86 | 1 | 0 |
| 90 | 90 | 2 | 0 |
| 917 | 917 | 1 | 0 |
| A-OK | A-OK | 1 | 0 |
| AA | Ann Arbor | 32 | 29 |
| AAIX | Acs International Inc | 0 | 5 |
| AAM | AAM | 0 | 1 |
| AAMX | ACFA Arrendadora de Carros de Ferrocarril S.A. | 0 | 10 |
| AAPV | AAPV | 0 | 16 |
| AAPX | AAPX | 0 | 1 |
| AAR | Association of American Railroads | 3 | 6 |
| AARX | AARX | 19 | 4 |
| AAST | AAST | 1 | 0 |
| AAX | AGRICO CHEMICAL | 1 | 0 |
| AB | Akron and Barberton Cluster Railway Company | 3 | 1 |
| ABB | Akron and Barberton Belt Railroad Company | 1 | 0 |
| ABBR | ABBR | 0 | 1 |
| ABC | Atlanta Birmingham & Coast | 4 | 1 |
| ABCX | Alabama Byproducts Corporation | 4 | 0 |
| ABEX | Advanced BioEnergy | 3 | 3 |
| ABFZ | Arkansas Best Freight | 0 | 166 |
| ABITIBI | ABITIBI | 4 | 0 |
| ABL | Alameda Belt Line | 3 | 0 |
| ABOX | TTX Company | 0 | 284 |
| ABP | Aberdeen & Briar Patch | 1 | 0 |
| ABPF | ABPF | 8 | 3 |
| ABRX | AB Rail Investments Incorporated | 0 | 1 |
| ABS | Alabama Southern Railroad | 0 | 9 |
| ABSX | ABSX | 0 | 4 |
| ABWX | Asea Brown Boveri Incorporated | 0 | 1 |
| AC | Algoma Central | 40 | 64 |
| AC-6 | AC-6 | 1 | 0 |
| ACAD | ACAD | 0 | 1 |
| ACAX | Honeywell International Incorporated | 1 | 0 |
| ACB | ACB | 0 | 1 |
| ACBX | American Cast Iron Pipe Company | 4 | 0 |
| ACCU | Aboitiz Shipping Corp | 0 | 4 |
| ACCX | Consolidation Coal Company | 2 | 35 |
| ACDX | Honeywell International Incorporated | 0 | 2 |
| ACE | ACE | 0 | 1 |
| ACELA | ACELA | 1 | 0 |
| ACES | ACES | 0 | 1 |
| ACEX | Altamont Commuter Express | 6 | 15 |
| ACFX | General Electric Rail Services | 0 | 3976 |
| ACHD | Atlantic City Harley Davidson | 1 | 0 |
| ACIX | Great Lakes Chemical Corporation | 1 | 0 |
| ACJ | Ashtabula, Carson & Jefferson Scenic | 3 | 0 |
| ACL | Atlantic Coast Line | 37 | 83 |
| ACLU | Atlantic Container Line Limited | 0 | 36 |
| ACLZ | Atlantic Container Line Ab | 0 | 4 |
| Acme | Acme Steel | 5 | 0 |
| ACMX | Voith Hydro Incorporated | 0 | 1 |
| ACP | ACP | 14 | 2 |
| ACPCO | ACPCO | 1 | 0 |
| ACPX | Union Tank Car Company | 0 | 10 |
| ACPZ | American Concrete Products Company | 0 | 1 |
| ACR | ACR | 1 | 1 |
| ACRC | Andalusia & Conecuh | 1 | 0 |
| ACRX | Elementis Chromium LP | 0 | 13 |
| ACSX | Honeywell International Incorporated | 0 | 1 |
| ACTX | Honeywell International Incorporated | 0 | 18 |
| ACW | ACW | 1 | 0 |
| ACWR | Aberdeen, Carolina & Western | 30 | 21 |
| ACY | Akron, Canton & Youngstown | 3 | 12 |
| ACZX | Norfolk Southern Railway Company | 0 | 1 |
| AD | Asbestos & Danville | 1 | 1 |
| ADBF | Adrian and Blissfield Rail Road Company | 11 | 14 |
| ADCX | Adolph Coors | 6 | 4 |
| ADFX | Agrium | 1 | 0 |
| ADIR | ADIR | 1 | 1 |
| ADIRONDACK | ADIRONDACK | 1 | 0 |
| ADIX | Adirondack Railway Preservation Society | 13 | 8 |
| ADM | ADM | 3 | 0 |
| ADMX | ADM Transportation Company | 45 | 3574 |
| ADN | Ashley Drew & Northern | 8 | 54 |
| ADRC | ADRC | 4 | 6 |
| ADTRANZ | ADTRANZ | 1 | 0 |
| ADVENZA | ADVENZA | 1 | 0 |
| AEAZ | AEAZ | 0 | 1 |
| AEC | Atlantic and East Carolina Railway Compa | 0 | 1 |
| AECX | Associated Electric Cooperative Incorporated (Mo.) | 1 | 86 |
| AEE | AEE | 2 | 3 |
| AEFR | Aurora Elgin and Fox River Electric | 1 | 0 |
| AEIX | Alan Eslisk | 1 | 0 |
| AELZ | AELZ | 0 | 5 |
| AEPX | American Electric Power | 4 | 279 |
| AEQX | ATEL Equipment Corporation | 0 | 85 |
| AERC | Albany and Eastern Railroad Company | 5 | 235 |
| AERX | American Energy Resources Generating Com | 0 | 155 |
| AERY | AERY | 1 | 0 |
| AESX | General Electric Rail Services | 0 | 15 |
| AEWZ | AEWZ | 0 | 1 |
| AEX | Andersons | 0 | 1850 |
| AF | Alabama and Florida Railway Company | 3 | 2 |
| AFCX | ATEL Capital Equipment Fund 7, L.P. | 0 | 52 |
| AFFU | Afrofreight Forwarders Ltd Transport | 0 | 1 |
| AFIU | ABS Industrial Verification Incorporated | 0 | 5 |
| AFLR | Alabama & Florida RR | 10 | 0 |
| AFPX | Honeywell International Incorporated | 0 | 39 |
| AFRX | AF Railway Industries Incorporated | 2 | 4 |
| AFSF | AFSF | 1 | 0 |
| AFSX | Astaris LLC | 0 | 8 |
| AFT | AFT | 3 | 1 |
| AFTX | AFTX | 1 | 0 |
| AG | Galveston Railroad L.P. | 1 | 0 |
| AGCR | Alamo Gulf Coast Railroad Company | 2 | 1 |
| AGCX | Procor Limited | 0 | 28 |
| AGENCE | AGENCE | 3 | 0 |
| AGHX | Agrium U.S. Incorporated | 0 | 4 |
| AGIX | AGRI Industries | 1 | 3 |
| AGLF | Knoxville & Holston River Railroad | 15 | 17 |
| AGLR | AGLR | 1 | 0 |
| AGLX | Andrews Petroleum Incorporated | 0 | 6 |
| AGMARK | AGMARK | 1 | 0 |
| AGMU | Agmark Foods Inc | 0 | 6 |
| AGMX | Terra Nitrogen Limited Partnership | 1 | 1 |
| AGP | AGP | 2 | 0 |
| AGPX | Ag Processing Incorporated | 14 | 434 |
| AGR | Alabama and Gulf Coast | 18 | 346 |
| AGRAIL | AGRAIL | 1 | 0 |
| AGREX | AGREX | 2 | 0 |
| AGRI | AGRI | 2 | 0 |
| AGRICO | AGRICO | 15 | 0 |
| AGRR | AGRR | 1 | 0 |
| AGVX | Ag Valley Co-op | 2 | 0 |
| AGX | AGX | 1 | 0 |
| AGYX | Centrex Construction Products Inc (American Gypsum Company) | 0 | 4 |
| AHBZ | AHBZ | 0 | 2 |
| AHCX | PCS Phosphate Company | 0 | 2 |
| AHGX | AHGX | 0 | 1 |
| AHMSA | AHMSA | 3 | 0 |
| AI | AI | 1 | 0 |
| AIGX | Aig Commercial Equipment Finance Inc | 0 | 35 |
| AIX | Aggregate Industries | 4 | 0 |
| AJPX | Searles Valley Minerals Operations, Inc. | 0 | 68 |
| AK | AK | 5 | 4 |
| AKDN | Acadiana Railway Company | 6 | 0 |
| AKLU | K Line | 0 | 11 |
| AKM | American Kraft Mills | 1 | 0 |
| AKMD | Arkansas Midland Railroad Company | 18 | 50 |
| AKS | AKS | 2 | 46 |
| AL | Almanor Railroad Company | 1 | 2 |
| ALAB | Alabama Railroad | 3 | 116 |
| ALARON | ALARON | 1 | 0 |
| ALAX | Equistar Chemicals, LP | 0 | 185 |
| ALBANY | ALBANY | 1 | 0 |
| ALBY | ALBY | 1 | 0 |
| ALC | ALC | 3 | 0 |
| ALCO | ALCO | 9 | 0 |
| ALCOA | ALCOA | 2 | 0 |
| ALEX | AGRI Industries | 0 | 1 |
| ALFR | ALFR | 1 | 0 |
| ALFU | ALFU | 0 | 2 |
| ALG | ALG | 2 | 0 |
| ALGILBERT | ALGILBERT | 1 | 0 |
| ALGX | Algoma Steel | 9 | 0 |
| ALHX | AllCapital Rail Management, LLC | 0 | 171 |
| ALKX | Airlake Terminal Railway Co. | 0 | 5 |
| ALL | America Latina Logistica | 404 | 4597 |
| ALLL | ALLL | 1 | 0 |
| ALLX | AllCapital Rail Management, LLC | 0 | 14 |
| ALLZ | Alliance Shippers Incorporated | 0 | 526 |
| ALM | Arkansas Louisiana and Mississippi Railr | 9 | 264 |
| ALMER | ALMER | 1 | 0 |
| ALMX | Trinity Rail Management Incorporated | 0 | 7 |
| ALNX | Alberta Government | 0 | 88 |
| ALPART | ALPART | 1 | 0 |
| ALPU | Chemoxal S.A. | 0 | 1 |
| ALPX | Alberta Government | 0 | 140 |
| ALPZ | ALPZ | 0 | 1 |
| ALQS | Aliquippa and Southern Railroad Company | 5 | 1 |
| ALR | Alan Richie Incorporated | 2 | 2 |
| ALRR | ALRR | 4 | 0 |
| ALS | Alton &Southern Railway | 24 | 50 |
| ALSTOM | ALSTOM | 1 | 0 |
| ALT | ALT | 0 | 1 |
| ALTU | VTG Vereinigte Tanklage U Transportmittel GMBH | 0 | 1 |
| ALTX | Southern Illinois Railcar Incorporated | 1 | 2 |
| ALTZ | ALTZ | 0 | 1 |
| ALUX | Alumax of South Carolina Incorporated | 0 | 3 |
| ALV | ALV | 0 | 1 |
| ALX | ALX | 1 | 0 |
| ALY | Allegheny and Eastern Railroad Incorpora | 11 | 89 |
| ALZ | ALZ | 0 | 1 |
| AM | Arkansas & Missouri | 42 | 69 |
| AMAX | AMAX Coal Company | 0 | 1 |
| AMBX | American Boiler Works Incorporated | 1 | 0 |
| AMC | Arkansas Louisiana and Mississippi Railr | 0 | 14 |
| AMCU | AMCU | 0 | 1 |
| AMCX | BP Amoco Chemical Company Chemical Division | 0 | 401 |
| AMDX | AMDX | 0 | 2 |
| AMER | AMER | 0 | 2 |
| AMERISTEEL | AMERISTEEL | 1 | 0 |
| AMEX | Allied Enterprises | 0 | 10 |
| AMFU | Amphibious Container Leasing Limited | 0 | 103 |
| AMFX | American Railcar Industries | 0 | 10 |
| AMG | AMG | 1 | 0 |
| AMGX | AMG Resources Corporation | 0 | 179 |
| AMHU | AMHU | 0 | 1 |
| AMHZ | American Highway Inc | 0 | 1 |
| AMIX | Railcar Leasing Specialists | 0 | 18 |
| AMK | AMK | 2 | 0 |
| AMLU | AMLU | 0 | 7 |
| AMLX | American Railcar Company | 2 | 0 |
| AMLZ | AMLZ | 0 | 2 |
| AMOX | Union Tank Car Company | 0 | 289 |
| AMPU | Alcan Aluminum Corporation | 0 | 1 |
| AMPX | General Electric Rail Services | 0 | 12 |
| AMR | Arcata & Mad River | 3 | 0 |
| AMSX | AllTrans Management Services Corp | 2 | 1 |
| AMTH | AMTH | 2 | 0 |
| AMTK | Amtrak | 1353 | 2054 |
| AMTX | TUCO Inc | 0 | 36 |
| AMTY | AMTY | 2 | 0 |
| AMTZ | Amtrak (National Railroad Passenger Corporation) | 0 | 20 |
| AMWX | AMWX | 4 | 0 |
| AMX | AMX | 1 | 0 |
| AMXX | AMXX | 0 | 1 |
| AMZU | Amphibious Container Leasing Ltd | 0 | 2 |
| AN | Apalachicola Northern | 21 | 55 |
| ANAX | General Electric Rail Services | 0 | 30 |
| ANBEL | ANBEL | 3 | 0 |
| ANBX | Anbel Corporation | 0 | 2 |
| ANCX | Norit Americas Incorporated | 0 | 1 |
| AND | AND | 1 | 0 |
| ANDX | Andesite Rock Company | 4 | 0 |
| ANGX | Andersons - Railgroup | 0 | 62 |
| ANHX | ANHX | 0 | 1 |
| ANKX | A and K Railroad Materials Incorporated | 0 | 3 |
| ANR | Angelina and Neches River Railroad | 3 | 47 |
| ANTU | ANTU | 0 | 1 |
| ANY | Athabasca Northern Railway | 1 | 0 |
| ANYU | ANYU | 0 | 3 |
| AO | Appalachian & Ohio | 20 | 2 |
| AOCX | Aluminum Company of America | 1 | 27 |
| AOE | American Orient Express | 0 | 38 |
| AOIX | Marathon Ashland Petroleum Company | 0 | 1 |
| AOK | Arkansas-Oklahoma Railroad | 16 | 1935 |
| APA | Apache Railway Company | 10 | 6 |
| APAX | Cimentos Apasco S.A. De C.V. | 0 | 10 |
| APCU | American President Lines Limited | 0 | 289 |
| APCX | Allied Lime Company | 0 | 3 |
| APD | Albany Port District | 2 | 0 |
| APEX | Apex Tank Car Line | 0 | 1 |
| APF | APF | 1 | 0 |
| APFF | APFF | 0 | 4 |
| APFFB | APFFB | 5 | 0 |
| APHG | APHG | 0 | 1 |
| APHJ | APHJ | 0 | 2 |
| APHU | APL Co. Pte. Ltd.- NOL Group | 0 | 434 |
| APHX | Air Products Polymers LP | 0 | 31 |
| APIX | Commonwealth Plan Incorporated | 0 | 4 |
| APJX | APJX | 0 | 1 |
| APLJ | American Presidential Lines | 0 | 14 |
| APLS | American President Lines, Ltd | 0 | 15 |
| APLU | American President Lines Limited | 0 | 546 |
| APLZ | American President Lines Limited | 0 | 15 |
| APM | APM | 1 | 0 |
| APMU | Maersk Lines | 0 | 38 |
| APMZ | Maersk Equipment Service Co. | 0 | 2 |
| APNC | Appanoose County Community Railroad | 1 | 0 |
| APOX | Albama Power Company | 0 | 3 |
| APPX | Appalachian Railcar Services | 1 | 14 |
| APPZ | APPZ | 0 | 1 |
| APR | APR | 2 | 0 |
| APRR | APRR | 3 | 0 |
| APRU | APL Logistics | 0 | 42 |
| APRX | Air Products and Chemicals Incorporated | 0 | 24 |
| APSX | Arizona Public Service Company | 1 | 0 |
| APTX | Air Products and Chemicals Incorporated | 0 | 6 |
| APWX | Appalachian Power Company | 0 | 1 |
| APX | APX | 0 | 1 |
| APZU | APL Co. Pte. Ltd.- NOL Group | 0 | 257 |
| AR | Aberdeen and Rockfish | 9 | 21 |
| ARA | Arcade and Attica Railroad Corporation | 6 | 7 |
| ARC | Alexander Railroad | 6 | 3 |
| ARCELOR | ARCELOR | 1 | 0 |
| ARCO | ARCO | 3 | 0 |
| ARCZ | ARCZ | 1 | 0 |
| AREX | Aeropres Corporation | 0 | 41 |
| ARG | ARG | 1 | 0 |
| ARGO | ARGO | 0 | 1 |
| ARHS | ARHS | 2 | 0 |
| ARI | ARI | 1 | 1 |
| ARIX | General Electric Rail Services | 0 | 80 |
| ARLX | A & R Leasing LLC | 0 | 1 |
| ARM | ARM | 1 | 0 |
| ARMCO | ARMCO | 5 | 0 |
| ARMH | Union Pacific Railroad Company | 0 | 1 |
| ARMN | Union Pacific Railroad Company | 0 | 2277 |
| ARMY | ARMY | 1 | 0 |
| ARN | Alberta RailNet Incorporated | 10 | 0 |
| ARND | Arnaud Railway | 1 | 0 |
| ARNM | ARNM | 0 | 1 |
| ARNZ | ARNZ | 0 | 1 |
| ARPX | BP Products North America | 4 | 4 |
| ARR | Alaska Railroad | 93 | 105 |
| ARRIVA | ARRIVA | 9 | 0 |
| ARROW | ARROW | 1 | 0 |
| ARRX | Anthracite Railroads Historical Society Incorporated | 2 | 0 |
| ARSX | Sunoco Inc. (R&M) | 0 | 109 |
| ARSZ | ARSZ | 0 | 1 |
| ART | American Refrigerator Transit Company | 0 | 4 |
| ARTX | Artrain | 0 | 11 |
| ARZC | Arizona and California Railroad | 23 | 3 |
| AS | AS | 4 | 1 |
| ASAB | Bay Line Railroad LLC | 19 | 87 |
| ASARCO | ASARCO | 3 | 0 |
| ASBESTOS | ASBESTOS | 1 | 0 |
| ASCX | ARMCO Steel Company | 11 | 0 |
| ASDX | Allied Services--A Division of Allied Equities Corp. | 12 | 1 |
| ASF | Inland Steel | 2 | 0 |
| ASFX | American Steel Foundries | 4 | 3 |
| ASG | ASG | 1 | 0 |
| ASGX | Ash Grove Cement Company | 0 | 13 |
| ASHX | Solvay Chemicals, Inc. | 0 | 239 |
| ASI | ASI | 0 | 1 |
| ASIU | Alliance Shippers Inc | 0 | 75 |
| ASLX | American Surface Lines, LLC | 0 | 6 |
| ASLZ | ASLZ | 0 | 3 |
| ASML | Atlanta, Stone Mountain & Lithonia | 10 | 0 |
| ASMX | ASMX | 1 | 0 |
| ASOX | ASOX | 0 | 25 |
| ASP | ASP | 0 | 1 |
| ASPL | ASPL | 0 | 3 |
| ASPX | American Steel Processing Co | 0 | 1 |
| ASR | Allegheny Southern Railroad Incorporated | 1 | 0 |
| ASRX | Domino Sugar Company | 0 | 8 |
| ASRY | Ashland Railway | 11 | 3 |
| ASTX | Asarco Incorporated | 1 | 5 |
| ASV | ASV | 1 | 2 |
| ASWC | ASWC | 1 | 0 |
| AT | Auto Train | 19 | 5 |
| ATAX | Arizona Transit Assembly | 0 | 10 |
| ATC | ATC | 2 | 0 |
| ATCX | Southern Illinois Railcar Incorporated | 2 | 2 |
| ATEF | ATEF | 0 | 1 |
| ATEX | Asplundh Tree Expert Co Railroad Division | 0 | 7 |
| ATGX | Atel Leasing Corporation | 15 | 151 |
| ATIX | Alstom Transportation | 2 | 3 |
| ATL | ATL | 6 | 1 |
| ATLAS | ATLAS | 2 | 0 |
| ATLS | ATLS | 1 | 0 |
| ATLT | Austin Todd and Ladd Railroad Company | 6 | 1 |
| ATLZ | American Marine Industries | 0 | 1 |
| ATN | Alabama & Tennessee River Railway Llc | 2 | 1 |
| ATRX | ATRX | 1 | 4 |
| ATS | ATS | 1 | 25 |
| ATSF | Atchison Topeka & Santa Fe | 2231 | 2889 |
| ATSFA | ATSFA | 1 | 0 |
| ATSZ | ATSZ | 0 | 6 |
| ATTX | TTX Company | 3 | 60 |
| ATW | Atlantic and Western | 5 | 1469 |
| ATX | ATX | 1 | 0 |
| AUAR | Austin Area Terminal Railway | 11 | 0 |
| AUBX | U.S. Plastic Lumber Ltd. | 0 | 1 |
| AUG | Augusta Railroad | 1 | 0 |
| AUGX | AUGX | 0 | 1 |
| AUNW | Austin & Northwestern | 5 | 0 |
| AUSTRAC | AUSTRAC | 1 | 0 |
| AUT | AUT | 0 | 1 |
| AVAZ | AVAZ | 0 | 1 |
| AVGX | Avon Grain | 1 | 0 |
| AVL | Aroostook Valley Railroad Company | 0 | 1 |
| AVLU | Allied Van Lines | 0 | 8 |
| AVR | Allegheny Valley | 12 | 1 |
| AVRT | AVRT | 0 | 7 |
| AVRZ | AVRZ | 0 | 3 |
| AW | AW | 1 | 1 |
| AWIU | AWIU | 0 | 200 |
| AWIX | Albright and Wilson Americas Incorporated | 0 | 1 |
| AWP | Atlanta & West Point | 11 | 18 |
| AWRR | AWRR | 1 | 0 |
| AWSU | Andrew Weir Shipping | 0 | 9 |
| AWSX | AWSX | 2 | 0 |
| AWVR | Unstoppable Movie Railroad | 9 | 6 |
| AWW | Algiers Winslow and Western Railway | 10 | 0 |
| AWXX | East Carbon development Company | 0 | 114 |
| AX | AX | 0 | 2 |
| AXXZ | Agricultural Express of America | 0 | 172 |
| AZ | AZ | 0 | 1 |
| AZCR | Arizona Central Railroad | 6 | 0 |
| AZCX | Azcon Corporation | 7 | 2 |
| AZER | Arizona Eastern Railway Company | 16 | 5 |
| AZEX | Arizona Electric Power Cooperative Incorporated | 0 | 7 |
| AZG | AZG | 1 | 0 |
| AZLU | Hapag Lloyd Container Line | 0 | 1 |
| AZMX | Arizona Railway Museum | 0 | 1 |
| AZPX | Arizona Power | 0 | 5 |
| AZRC | AZRC | 2 | 0 |
| AZXX | Arizona Chemical Company | 0 | 26 |
| B | B | 0 | 2 |
| B-1V | B-1V | 1 | 0 |
| BA | Baltimore & Annapolis | 3 | 3 |
| BAEX | Andersons | 0 | 137 |
| BAFU | Bulkhaul Ltd. | 0 | 3 |
| BAGNALL | BAGNALL | 1 | 0 |
| BALDWIN | BALDWIN | 1 | 0 |
| BALX | Bayer Corporation | 0 | 8 |
| BANA | BANA | 0 | 1 |
| BAP | Butte Anaconda & Pacific | 2 | 2 |
| BAR | Bangor & Aroostook | 74 | 191 |
| BARR | BARR | 1 | 0 |
| BART | BART | 1 | 0 |
| BARTLETT | BARTLETT | 1 | 0 |
| BARU | Barons Leasing Corporation | 0 | 1 |
| BARX | Bartlett Grain | 1 | 0 |
| BARZ | Bangor and Aroostook Railroad Company | 0 | 1 |
| BAT | BAT | 0 | 1 |
| BAURU | BAURU | 1 | 0 |
| BAWX | Babcox & Wilcox | 0 | 4 |
| BAYL | Bay Line, LLC | 25 | 22 |
| BAYU | Mobay Chemical Corporation | 0 | 3 |
| BAYX | Bayer Corporation | 0 | 4 |
| BB | Buckingham Branch | 13 | 37 |
| BBCI | BBCI | 1 | 0 |
| BBCX | ABB Power Generation Incorporated | 0 | 3 |
| BBFX | Babcock & Brown Rail Management LLC | 0 | 4 |
| BBGX | Greenbrier Management Services, LLC | 0 | 33 |
| BBLX | Babcock & Brown Rail Management LLC | 0 | 1 |
| BBOH | Bloomingburg Ohio | 1 | 0 |
| BBPX | Blue Ribbon Beef Pack | 0 | 1 |
| BBRX | Bombardier Incorporated Transportation Equipment Group | 0 | 3 |
| BBZ | BBZ | 0 | 1 |
| BC | BC | 5 | 10 |
| BCAX | Blue Circle Incorporated | 0 | 30 |
| BCC | BCC | 1 | 0 |
| BCCX | Border Chemical Company Limited | 0 | 1 |
| BCEN | BCEN | 3 | 4 |
| BCER | BCER | 1 | 0 |
| BCG | BCG | 1 | 0 |
| BCGL | BCGL | 0 | 1 |
| BCH | Southern Railway of British Columbia Limited | 3 | 1 |
| BCIT | Canadian National Railways | 0 | 40 |
| BCIU | Bay Cities Leasing Company | 0 | 4 |
| BCIX | Blue Circle Incorporated | 0 | 27 |
| BCK | Buffalo Creek Flour | 8 | 4 |
| BCLR | Bay Colony | 9 | 15 |
| BCNE | Canadian National Railway | 0 | 5 |
| BCOL | Canadian National Railways | 187 | 788 |
| BCPA | BCPA | 1 | 0 |
| BCPM | BCPM | 0 | 14 |
| BCPX | BCPX | 0 | 1 |
| BCQ | BCQ | 2 | 0 |
| BCR | Bay Coast Railroad | 10 | 6 |
| BCRX | General Electric Rail Services Corporation | 1 | 0 |
| BCRY | Cando Contracting Limited (Barrie-Collingwood Railway) | 1 | 0 |
| BCS | BCS | 3 | 0 |
| BCSR | Buckeye Central Scenic Railroad | 1 | 0 |
| BCSX | Buckeye Central Scenic Railroad | 2 | 0 |
| BCT | BCT | 0 | 1 |
| BCUK | BCUK | 0 | 1 |
| BCUX | BCUX | 0 | 7 |
| BCVX | West Coast Express | 2 | 3 |
| BDCX | Anchor Glass Container | 0 | 7 |
| BDLX | Big Dog Lines | 35 | 29 |
| BDNX | Baroid Drilling Fluids Incorporated | 0 | 1 |
| BDRV | Belvidere & Delaware Railroad | 13 | 22 |
| BDW | Bighorn Divide & Wyoming Railroad | 3 | 16 |
| BE | BE | 2 | 0 |
| BEBX | BEBX | 1 | 0 |
| BECKER | Becker Sand & Gravel | 1 | 0 |
| BECX | FMC Corporation | 0 | 1 |
| BEDT | Brooklyn East District Terminal | 12 | 0 |
| BEDX | BEDX | 0 | 1 |
| BEEM | Beech Mountain Railroad Corporation | 1 | 0 |
| BEFE | BEFE | 1 | 0 |
| BEIX | BEIX | 0 | 1 |
| BELVIDERE | BELVIDERE | 1 | 0 |
| BEPX | BioFuel Energy Corp, Pioneer Trail Energy LLC. | 1 | 2 |
| BER | BER | 1 | 0 |
| BERY | BERY | 4 | 0 |
| BETH | BETH | 1 | 0 |
| BF | BF | 1 | 0 |
| BFBX | Bakery Feeds, Division of Griffin Indust | 0 | 8 |
| BFC | BFC | 0 | 1 |
| BFEX | Berthold Farmers Elevator | 3 | 0 |
| BFGX | Oxy Vinyls LP | 0 | 57 |
| BFIX | Borden Foods | 0 | 2 |
| BFJ | BFJ | 1 | 0 |
| BFLU | BFLU | 0 | 7 |
| BFPX | Besse Forest Products | 0 | 20 |
| BFRX | Bakery Trading Company | 0 | 6 |
| BFTX | Bill Frank Trucking | 0 | 73 |
| BGCM | Bg & Cm Railroad | 5 | 0 |
| BGCX | Badger Grain Company Inc. | 0 | 1 |
| BGER | BGER | 2 | 0 |
| BGEX | General American Marks Company | 0 | 19 |
| BGFX | Barnabus Group Foundation | 0 | 1 |
| BGLX | BGLX | 0 | 1 |
| BGR | BGR | 1 | 0 |
| BGRM | Bluegrass Railroad Museum | 3 | 9 |
| BGRR | Bluegrass Scenic Railroad | 5 | 4 |
| BGSX | Strata Corporation | 3 | 4 |
| BH | Bath & Hammondsport | 3 | 1 |
| BHC | Black Hills Central | 6 | 3 |
| BHCR | BHCR | 7 | 4 |
| BHCU | Bridgehead Container Service | 0 | 17 |
| BHM | BHM | 1 | 0 |
| BHP | BHP Nevada Railroad Company | 19 | 0 |
| BHRX | Bellefonte Historical Railroad | 2 | 0 |
| BHS | Bonhomie & Hattiesburg Southern | 1 | 0 |
| BIGX | Air Liquide America Corporation | 0 | 5 |
| BIMO | BIMO | 0 | 1 |
| BIPX | Anamax LLC | 0 | 12 |
| BIRR | Bellingham International Railroad LLC | 0 | 1 |
| BISX | Brandenburg Industrial Service Co | 0 | 28 |
| BITY | Penn Eastern Rail Lines Incorporated | 2 | 1 |
| BJHX | BJ Titan Services Company | 0 | 6 |
| BJOX | Citicorp Railmark, Inc. | 0 | 34 |
| BJRY | Burlington Junction Railway | 12 | 0 |
| BK | BK | 0 | 2 |
| BKRR | Batten Kill Railroad | 2 | 4 |
| BKRU | Baker Tanks | 0 | 1 |
| BKSX | BKSX | 0 | 1 |
| BKTY | Union Pacific Railroad Company | 0 | 16 |
| BL | BL | 3 | 0 |
| BLA | BLA | 2 | 1 |
| BLCX | Commonwealth Plan Incorporated | 0 | 1 |
| BLD | BLD | 2 | 0 |
| BLE | Bessemer & Lake Erie | 77 | 275 |
| BLH | BLH | 2 | 0 |
| BLKU | Bulkhaul Company Limited | 0 | 14 |
| BLMR | Blue Mountain | 6 | 2 |
| BLOL | Bloomer Shippers Connecting Railroad Co. | 8 | 1 |
| BLR | Blackland | 5 | 0 |
| BLS | BLS | 14 | 0 |
| BLT | BLT | 7 | 0 |
| BLW | Baldwin Locomotive Works | 4 | 0 |
| BM | Boston & Maine | 301 | 359 |
| BMAU | BMAU | 0 | 10 |
| BMC | BMC | 3 | 1 |
| BMCU | BMCU | 0 | 2 |
| BMCX | Bluewater Michigan Chapter Incorporated | 0 | 8 |
| BMD | BMD | 2 | 1 |
| BMDZ | Minnesota Dakota and Western Railway Com | 0 | 20 |
| BMEX | Brookville Equipment Corp | 14 | 0 |
| BMH | Beaufort and Morehead Railroad Co | 6 | 1 |
| BML | Belfast & Mooshead Lake | 4 | 7 |
| BMLP | BMLP | 5 | 2 |
| BMM | BMM | 1 | 0 |
| BMN | BMN | 0 | 1 |
| BMOU | BMOU | 0 | 5 |
| BMR | BMR | 10 | 1 |
| BMRG | Blue Mountain & Reading | 3 | 0 |
| BMS | Berlin Mills | 0 | 4 |
| BMT | BMT | 3 | 0 |
| BMZ | Boston and Maine Corp | 0 | 6 |
| BN | Burlington Northern | 3136 | 7293 |
| BNA | Burlington Northern Business Cars | 0 | 2 |
| BNAU | Burlington Northern and Santa Fe Railway Company | 0 | 15 |
| BNBX | Greenbrier Management Services, LLC | 0 | 317 |
| BNEC | BNEC | 2 | 0 |
| BNF | BNF | 2 | 0 |
| BNFE | Burlington Northern Fruit Express | 0 | 211 |
| BNFS | BNFS | 0 | 1 |
| BNFT | Burlington Northern Fuel Tender | 0 | 19 |
| BNG | Blackwell Northern Gateway Railroad Comp | 0 | 1 |
| BNGT | BNGT | 0 | 2 |
| BNGX | Bunge Corporation | 4 | 91 |
| BNH | BNH | 0 | 4 |
| BNO | Burlington Northern and Santa Fe Railway Company | 0 | 4 |
| BNQ | Burlington Northern and Santa Fe Railway | 0 | 20 |
| BNR | BNR | 1 | 0 |
| BNS | BNS | 1 | 0 |
| BNSF | BNSF Railway | 7744 | 16993 |
| BNX | BNX | 0 | 2 |
| BNZ | Burlington Northern and Santa Fe Railway | 0 | 24 |
| BO | Baltimore & Ohio | 926 | 688 |
| BOB | BOB | 2 | 0 |
| BOCT | CSX Transportation (Baltimore & Ohio Chicago Terminal Railro | 9 | 1 |
| BOCU | BOC Process Plants | 0 | 1 |
| BOCX | BOC Gases | 0 | 5 |
| BOMARDIER | BOMARDIER | 1 | 0 |
| BOMBARDIER | BOMBARDIER | 1 | 0 |
| BOMX | B&O Railroad Museum Inc. | 7 | 2 |
| BOP | Border Pacific Railroad Company | 2 | 0 |
| BORDER | BORDER | 1 | 0 |
| BORX | U.S. Borax Incorporated | 0 | 45 |
| BOTS | BOTS | 0 | 4 |
| BOZ | Baltimore & Ohio | 0 | 14 |
| BP | BP | 38 | 1 |
| BP55 | BP55 | 1 | 0 |
| BPCO | BPCO | 1 | 0 |
| BPCU | B P Chemicals Belgium | 2 | 0 |
| BPEX | BPEX | 1 | 0 |
| BPM | BPM | 0 | 1 |
| BPOX | BP Amoco Chemical Comp. BP Oil Division | 0 | 6 |
| BPPX | GATX Capital Corporation | 6 | 1 |
| BPRR | Buffalo and Pittsburgh | 69 | 256 |
| BPRX | BP Amoco Chemical Company Chemical Division | 0 | 80 |
| BPU | BPU | 1 | 0 |
| BQT | BQT | 2 | 0 |
| BR | Buffalo and Pittsburgh | 5 | 56 |
| BR(WR) | BR(WR) | 1 | 0 |
| BR1 | British Railways | 577 | 29 |
| BRAN | Brandon Rail | 1 | 1036 |
| BRAU | BRAU | 0 | 1 |
| BRAX | General American Marks Company | 0 | 71 |
| BRBP | BRBP | 0 | 1 |
| BRC | Belt Railway of Chicago | 78 | 32 |
| BRCX | Union Tank Car Company | 1 | 117 |
| BRE | BRE | 0 | 1 |
| BREWSTER | BREWSTER | 3 | 0 |
| BRG | Brownsville and Rio Grande International Railroad | 12 | 0 |
| BRGX | BRGX | 0 | 1 |
| BRIMSTONE | BRIMSTONE | 1 | 0 |
| BRIX | Union Tank Car Company | 0 | 119 |
| BRK | BRK | 0 | 2 |
| BRLCO | BRLCO | 1 | 0 |
| BRLP | BRLP | 1 | 0 |
| BRLX | BRS Leasing Co., Inc. | 2 | 0 |
| BRMI | BRMI | 3 | 0 |
| BRMX | Berkshire Railway Museum Inc | 4 | 3 |
| BRNZ | Comtrak Incorporated | 0 | 1 |
| BROWNS | BROWNS | 1 | 0 |
| BRP | BRP | 1 | 0 |
| BRPX | Blue Ridge Paper | 2 | 0 |
| BRR | BRR | 0 | 2 |
| BRRX | Brooklyn Resource Recovery Incorporated | 0 | 3 |
| BRS | BRS | 0 | 2 |
| BRSR | BRSR | 0 | 8 |
| BRSX | High Sierra Transportation, LLC | 1 | 18 |
| BRT | BRT | 4 | 1 |
| BRW | Black River And Western | 18 | 26 |
| BS | Birmingham Southern RR | 47 | 63 |
| BSB | BSB | 0 | 7 |
| BSC | BSC | 10 | 0 |
| BSCX | Bethlehem Steel Corporation | 1 | 7 |
| BSE | Birmingham & Southeastern | 2 | 1 |
| BSEX | Badger State Ethanol Llc | 0 | 11 |
| BSF | BSF | 1 | 0 |
| BSFSR | BSFSR | 1 | 0 |
| BSG | BSG | 1 | 0 |
| BSIU | Blue Sky Intermodal (UK) Ltd | 0 | 42 |
| BSIX | Bethlehem Steel Corporation | 0 | 1 |
| BSIZ | BSIZ | 0 | 1 |
| BSLY | BSLY | 0 | 1 |
| BSM | BSM | 1 | 0 |
| BSMX | Bay State Milling Company | 1 | 0 |
| BSNF | BSNF | 3 | 0 |
| BSOR | Buffalo Southern | 11 | 8 |
| BSPR | BSPR | 1 | 0 |
| BSPX | Otter Tail Power Company (S.Dak.) | 0 | 13 |
| BSR | BSR | 1 | 0 |
| BSRR | BSRR | 3 | 0 |
| BSRW | BSRW | 2 | 0 |
| BSRX | Branson Scenic | 3 | 5 |
| BSRY | BSRY | 1 | 1 |
| BST | BST | 40 | 1 |
| BSTR | BSTR | 0 | 1 |
| BSTX | Trinitas Corporation | 0 | 1 |
| BSVR | BSVR | 0 | 1 |
| BSVY | Boone & Scenic Valley Railroad | 6 | 11 |
| BSX | BSX | 0 | 2 |
| BT | BT | 2 | 0 |
| BTC | Birmingham Terminal | 1 | 0 |
| BTCO | Boston Terminal Company | 1 | 0 |
| BTCX | Browner Turnout Company | 0 | 28 |
| BTH | BTH | 2 | 0 |
| BTN | BTN | 0 | 1 |
| BTRX | Rocky Mountain Transportation Services | 0 | 81 |
| BTTX | TTX Company | 0 | 153 |
| BU | BU | 0 | 1 |
| BUCY | BUCY | 0 | 1 |
| BUDD | BUDD | 5 | 0 |
| BUDX | Budd Company (temporary) | 0 | 1 |
| BUEN | BUEN | 0 | 1 |
| BUGX | Bruggere and Monson | 5 | 0 |
| BUKX | Louisville Gas and Electric Company | 0 | 1 |
| BULLARD | BULLARD | 1 | 0 |
| BURLINGTON | BURLINGTON | 1 | 0 |
| BURR | BURR | 0 | 1 |
| BUTT | BUTT | 0 | 1 |
| BVB | BVB | 12 | 0 |
| BVDR | BVDR | 1 | 0 |
| BVI | BVI | 1 | 0 |
| BVRV | BVRV | 0 | 1 |
| BVRY | Brandywine Valley Railroad Company | 4 | 58 |
| BVS | Bevier and Southern | 1 | 0 |
| BW | BW | 4 | 9 |
| BWCM | BWCM | 1 | 0 |
| BWCX | GE Plastics | 1 | 7 |
| BWL | BWL | 1 | 0 |
| BWLX | Lansing Board of Power & Light | 1 | 119 |
| BWMX | BWMX | 0 | 1 |
| BX | BX | 0 | 1 |
| BXN | Bauxite and Northern Railway Company | 3 | 0 |
| BYCX | Chelatchie Prairie Railroad | 2 | 3 |
| C | C | 3 | 1 |
| CA | Chesapeake & Albemarle | 7 | 1 |
| CAB | CAB | 0 | 3 |
| CABO | CABO | 0 | 2 |
| CABX | Cabot Corporation | 0 | 56 |
| CACV | Delaware Otswego | 7 | 5 |
| CACX | Cooperstown & Charlotte Valley Railroad | 0 | 1 |
| CAD | Cadiz Railroad | 1 | 0 |
| CADU | Costa Container SPA | 0 | 3 |
| CAE | Chicago Aurora & Elgin | 16 | 2 |
| CAEG | Coffeen and Western | 0 | 574 |
| CAGX | MHC Incorporated Subsidiary of ConAgra Incorporated | 14 | 335 |
| CAGY | Columbus & Greenville Railway | 51 | 161 |
| CAIU | Container Applications International | 0 | 33 |
| CAIZ | CAIZ | 3 | 0 |
| CAJO | CAJO | 0 | 1 |
| CALA | Carolina Southern | 13 | 2 |
| CALERA | CALERA | 1 | 0 |
| CALT | CALT | 0 | 1 |
| CALX | California Railcar Corporation | 0 | 16 |
| CAMP | CAMP | 0 | 1 |
| CAMPO | CAMPO | 1 | 0 |
| CANA | CANA | 0 | 1 |
| CAND | CAND | 0 | 1 |
| CANTON | CANTON | 3 | 0 |
| CANX | CANAC International | 31 | 10 |
| CAOX | Westlake CA and O | 0 | 2 |
| CAR | CAR | 2 | 1 |
| CARG | CARG | 0 | 1 |
| CARGIL | CARGIL | 1 | 0 |
| CARGILL | CARGILL | 6 | 0 |
| CARI | CARI | 0 | 1 |
| CARR | Carrollton Railroad | 2 | 0 |
| CART | CART | 1 | 0 |
| CARTIER | CARTIER | 21 | 0 |
| CARU | Caru | 0 | 20 |
| CARX | Caliber Auto Transfer | 3 | 1 |
| CASS | Cass Scenic | 12 | 5 |
| CASU | Hapag Lloyd Container Line | 0 | 6 |
| CAT | Central Arkansas Transit | 5 | 0 |
| CATP | CATP | 0 | 2 |
| CATS | Charlotte Area Transit System | 15 | 4 |
| CATTRON | CATTRON | 1 | 0 |
| CATU | CATU Containers S.A. | 0 | 4 |
| CATX | General American Marks Company | 0 | 32 |
| CAXU | Container Applications International Incorporated | 0 | 462 |
| CAXX | CEMENTO CRUZ AZUL | 0 | 4 |
| CB | CB | 1 | 3 |
| CBC | Chemins de fer Baie des Chaleurs Incorporated | 2 | 3 |
| CBCNS | CBCNS | 1 | 0 |
| CBCX | Morton International | 3 | 1 |
| CBFU | Chiquita Brands International | 0 | 1 |
| CBG | CBG | 2 | 0 |
| CBGR | Council Bluffs Railway Company/Great Wes | 2 | 0 |
| CBH | CBH | 0 | 4 |
| CBHU | China Ocean Shipping Company | 0 | 442 |
| CBL | Conemaugh and Black Lick Railroad | 3 | 4 |
| CBLC | CBLC | 1 | 0 |
| CBLX | CBLX | 0 | 1 |
| CBM | CBM | 0 | 1 |
| CBNS | Cape Breton & Central Nova Scotia Ry | 27 | 11 |
| CBP | CBP | 2 | 0 |
| CBPX | Custom Building Products | 0 | 4 |
| CBQ | Chicago Burlington & Quincy | 528 | 418 |
| CBQX | CBQX | 0 | 1 |
| CBQZ | Burlington Northern and Santa Fe Railway Company | 0 | 2 |
| CBRAIL | CBRAIL | 1 | 0 |
| CBRM | Chillicothe-Brunswick Rail Maintenance | 2 | 2 |
| CBRR | CBRR | 0 | 1 |
| CBRW | Columbia Basin Railroad | 12 | 37 |
| CBRX | Charles Barthold | 0 | 9 |
| CBRY | Copper Basin Railway | 16 | 67 |
| CBT | CBT | 2 | 0 |
| CBTU | CBTU | 1 | 0 |
| CBX | CBX | 1 | 0 |
| CC | Chicago Central & Pacific | 106 | 213 |
| CCA | CCA | 2 | 0 |
| CCBX | Union Carbide Corporation | 0 | 540 |
| CCC | Cape Cod Central | 2 | 0 |
| CCCL | Connecticut Central Railroad Company | 3 | 2 |
| CCCX | CII Carbon, LLC | 0 | 6 |
| CCCZ | Compass Container Co Incorporated | 0 | 1 |
| CCEH | CCEH | 0 | 1 |
| CCEX | CCC Transport Company | 0 | 8 |
| CCGX | Cando Contracting Limited | 4 | 4 |
| CCH | Cape Cod & Hyannis | 1 | 1 |
| CCIX | CCIX | 0 | 2 |
| CCKX | CCKX Incorporated | 0 | 3 |
| CCKY | Chattooga & Chickamauga Railway | 5 | 1 |
| CCL | CCL | 1 | 0 |
| CCLU | Char Ching Shipping (USA) Limited | 0 | 602 |
| CCLX | Crystal Car Line | 7 | 472 |
| CCNW | CCNW | 0 | 1 |
| CCO | Clinchfield | 2 | 9 |
| CCOR | CCOR | 0 | 6 |
| CCORP | CCORP | 3 | 0 |
| CCP | CCP | 10 | 2 |
| CCR | Kansas City Southern | 3 | 46 |
| CCRA | Camp Chase Industrial Railroad Corporati | 4 | 0 |
| CCRC | CCRC | 1 | 0 |
| CCRG | CCRG | 2 | 0 |
| CCRL | Cleveland Commercial RR | 1 | 0 |
| CCRR | Claremont Concord | 5 | 1 |
| CCRU | Compagnie Des Containers Reservoir | 0 | 1 |
| CCRX | Coastal Refining and Marketing Incorporated | 2 | 1 |
| CCRY | Charles City Rail Lines Incorporated | 1 | 0 |
| CCS | CCS | 1 | 0 |
| CCSS | CCSS | 0 | 1 |
| CCT | Central California Traction Company | 8 | 1 |
| CCTF | CCTF | 0 | 4 |
| CCTR | CCTR | 7 | 0 |
| CCTX | Coleto Creek Power WLE, LP | 1 | 36 |
| CCUO | Chicago-Chemung Railroad Corporation | 1 | 0 |
| CCV | CCV | 4 | 0 |
| CCVNGRR | CCVNGRR | 2 | 0 |
| CCW | Charles City & Western | 3 | 0 |
| CCX | Columbian Chemicals Co | 2 | 101 |
| CCZ | CCZ | 1 | 1 |
| CD | Ceske Drahy | 66 | 2 |
| CDAC | Canadian American | 14 | 0 |
| CDAU | Canadian Tire Corporation Limited | 0 | 5 |
| CDCX | Air Liquide America Corporation | 0 | 8 |
| CDEGC | CDEGC | 1 | 0 |
| CDEX | Coastal Distribution, LLC | 0 | 24 |
| CDHX | Caledonian Rail Lines, LLC | 0 | 1 |
| CDME | CDME | 1 | 0 |
| CDOT | Conneticut Department of Transportation | 77 | 29 |
| CDTX | California DOT | 44 | 46 |
| CDWX | M-R Logistics, LLC | 0 | 4 |
| CDX | CDX | 1 | 1 |
| CDYZ | CDYZ | 1 | 0 |
| CE | CE | 4 | 0 |
| CEAD | CEAD | 0 | 1 |
| CEBX | Combustion Engineering Incorporated | 0 | 3 |
| CEDA | CEDA | 0 | 2 |
| CEDX | G.S.S.&M. Inc, Rail Division | 0 | 11 |
| CEEC | Coast Engine and Equipment Co | 1 | 0 |
| CEFX | CIT Group/Capital Finance, Inc | 396 | 5144 |
| CEI | Chicago & Eastern Illinois | 18 | 15 |
| CEIW | Central Indiana and Western RR Company | 2 | 0 |
| CEIX | Cleveland Electric | 10 | 0 |
| CELX | Celtran Incorporated (Hoechst Celanese Corp) | 0 | 164 |
| CEMEX | CEMEX | 3 | 0 |
| CEMR | Central Manitoba Railway Incorporated | 6 | 0 |
| CEMX | Cemex Mexico SA de CV | 5 | 55 |
| CENTRAL | CENTRAL | 5 | 0 |
| CEPX | Trinity Industries Leasing | 0 | 1 |
| CEPZ | CEPZ | 0 | 3 |
| CERA | Central RR of Indianapolis | 15 | 2 |
| CERFX | CERFX | 1 | 0 |
| CERX | ER Carpenter LLP | 1 | 21 |
| CESX | CESX | 2 | 7 |
| CEWX | Canadian Enterprise Gas Products | 0 | 5 |
| CEX | CEX | 0 | 1 |
| CF | Cape Fear Railways Incorporated | 2 | 1 |
| CFB | CFB | 0 | 1 |
| CFCLA | CFCLA | 8 | 0 |
| CFE | Chicago, Fort Wayne and Eastern | 10 | 0 |
| CFER | CFER | 1 | 0 |
| CFF | CFF | 11 | 0 |
| CFI | CFI | 1 | 1 |
| CFIX | CFIX | 2 | 1 |
| CFIZ | CFIZ | 3 | 2 |
| CFKX | CFKX | 0 | 1 |
| CFKZ | XTRA Intermodal | 0 | 148 |
| CFL | Cf Lanaudiere Inc. | 1 | 0 |
| CFM | CFM | 2 | 1 |
| CFMC | CFMC | 1 | 0 |
| CFMG | Chemin De Fer De La Matapedia Et Du Golf | 7 | 3 |
| CFMX | Cargill Incorporated | 0 | 65 |
| CFNF | CFNF | 1 | 0 |
| CFNR | California Northern | 14 | 2 |
| CFQ | CFQ | 1 | 0 |
| CFSX | C and T Refinery Incorporated | 0 | 1 |
| CFT | CFT | 1 | 0 |
| CFW | Caney fork & Western | 0 | 2 |
| CFWR | Caney Fork and Western Railroad | 4 | 40 |
| CFZ | CFZ | 0 | 5 |
| CG | Central Of Georgia | 22 | 50 |
| CGAX | Cargill Incorporated C.G.D. Division | 12 | 147 |
| CGB | CGB | 1 | 0 |
| CGBX | Dow Chemical Canada Incorporated | 4 | 4 |
| CGC | CGC | 1 | 0 |
| CGCX | Cargill Incorporated C.G.D. Division | 6 | 72 |
| CGDX | Country Gas Distributors Incorporated | 0 | 1 |
| CGE | CGE | 1 | 0 |
| CGEX | Cargill Incorporated C.G.D. Division | 0 | 233 |
| CGFX | Consolidated Gas Company of Florida | 1 | 0 |
| CGIX | Collingwood | 1 | 0 |
| CGLX | GATX Rail Canada | 0 | 466 |
| CGMU | Compagnie Generale Maritime (French Line) | 0 | 4 |
| CGMX | GATX Rail Canada | 0 | 3 |
| CGNE | Champagne Railroad Incorporated | 0 | 1 |
| CGOX | Cargill Incorporated | 0 | 147 |
| CGPX | CGPX | 0 | 2 |
| CGR | CG Railway, Inc | 1 | 24 |
| CGRX | Consolidated Grain and Barge | 10 | 17 |
| CGTU | Compagnie Generale Maritime (French Line) | 0 | 1 |
| CGTX | GATX Rail Canada | 0 | 460 |
| CGW | Chicago Great Western | 105 | 84 |
| CGWX | Crete Grain Co Inc | 1 | 0 |
| CGX | CGX | 1 | 1 |
| CH | Calumet & Hecla | 2 | 1 |
| CH-M | CH-M | 8 | 0 |
| CH-P | CH-P | 1 | 0 |
| CHAE | CHAE | 0 | 1 |
| CHAMBLEE | CHAMBLEE | 1 | 0 |
| CHAMPAIGN | CHAMPAIGN | 1 | 0 |
| CHAP | CHAP | 1 | 1 |
| CHAR | CHAR | 0 | 1 |
| CHARLOAIS | CHARLOAIS | 1 | 0 |
| CHAT | Chattahoochee & Gulf | 6 | 0 |
| CHAU | Combined Transport Group Incorporated | 0 | 2 |
| CHCO | Chesanning & Owasso Central | 1 | 0 |
| CHEM | CHEM | 0 | 1 |
| CHES | CHES | 0 | 11 |
| CHESSIE | CHESSIE | 6 | 0 |
| CHEX | Equistar Chemicals, LP | 0 | 4 |
| CHFU | Challenge International | 0 | 1 |
| CHGX | Chicago Gravel | 1 | 0 |
| CHICAGO | CHICAGO | 1 | 0 |
| CHIN | CHIN | 0 | 5 |
| CHIU | Capital Lease | 0 | 1 |
| CHLU | Consortium Hispania Lines | 0 | 4 |
| CHM | CHM | 7 | 0 |
| CHMP | CHMP | 1 | 0 |
| CHP | Ferrocarriles Nacionales de Mexico | 11 | 8 |
| CHPX | CHPX | 5 | 0 |
| CHR | Chestnut Ridge Railway Company | 2 | 0 |
| CHROME | CHROME | 1 | 0 |
| CHRR | Chesapeake Railroad Company | 0 | 3 |
| CHRX | The Chesapeake Division | 0 | 2 |
| CHRY | CHRY | 1 | 0 |
| CHS | Charlotte Southern | 4 | 3 |
| CHSX | CHS Inc. | 15 | 94 |
| CHTS | Penn Eastern Rail Lines Incorporated | 0 | 5 |
| CHTT | Chicago Heights Terminal Transfer | 0 | 781 |
| CHUX | US Ecology Idaho, Inc. | 0 | 155 |
| CHV | Chattahoochee Valley Ry | 6 | 4 |
| CHVX | Chevron Phillips Chemical Company | 1 | 323 |
| CHW | Chesapeake Western | 2 | 3 |
| CHWE | CHWE | 0 | 1 |
| CI | Cambria and Indiana Railroad Company | 24 | 7 |
| CIC | Cedar Rapids & Iowa City | 33 | 105 |
| CIFG | CIFG | 0 | 1 |
| CIGX | CIGX | 0 | 5 |
| CIL | Chicago Indianapolis & Louisville (Monon | 4 | 10 |
| CIM | Chicago And Illinois Midland | 32 | 21 |
| CIMX | CIMX | 0 | 1 |
| CIND | Central RR of Indiana | 14 | 3 |
| CIPS | Central Illinois Public Servicee | 3 | 0 |
| CIPX | Ameren Energy Generating Company | 0 | 139 |
| CIRC | CIRC | 0 | 4 |
| CIRR | Chattahoochee Industrial Railroad | 23 | 274 |
| CIRX | Consbec Incorporated | 0 | 1 |
| CIRY | Central Illinois Railroad Company | 4 | 0 |
| CISD | Golden Isles Terminal Railroad | 2 | 1 |
| CITX | CIT Group/Capital Finance, Inc | 60 | 977 |
| CITY | CITY | 0 | 1 |
| CIW | Central Indiana and Western | 7 | 1 |
| CJ | CJ | 0 | 1 |
| CKFX | CKFX | 1 | 0 |
| CKIN | Chesapeke & Indiana | 2 | 0 |
| CKIX | C.K. Industries | 0 | 44 |
| CKR | CKR | 1 | 0 |
| CKRY | Central Kansas Railway Incorporated | 12 | 15 |
| CKS | CKS | 1 | 0 |
| CKSR | CKSR | 3 | 3 |
| CL | CL | 0 | 5 |
| CLASS | CLASS | 12 | 0 |
| CLAX | Guardian Leasing Inc | 0 | 7 |
| CLC | Columbia and Cowlitz Railway Company | 7 | 202 |
| CLCR | Cadillac & Lake City RR | 1 | 0 |
| CLCX | Chattahoochee Locomotive | 15 | 0 |
| CLE | Cincinnati & Lake Erie | 2 | 0 |
| CLEI | CLEI | 1 | 0 |
| CLEX | Cieco Corporation | 0 | 4 |
| CLGX | CLGX | 0 | 1 |
| CLHU | Capital Lease Hamburg | 0 | 389 |
| CLIX | Calumet Lubricants | 0 | 42 |
| CLK | Cadillac & Lake City | 3 | 0 |
| CLNA | Carolina Coastal Railway Incorporated | 9 | 4 |
| CLOU | CLOU Container Leasing GmbH | 0 | 2 |
| CLOX | Clark Refining and Marketing Incorporated | 0 | 3 |
| CLP | Clarendon and Pittsford | 6 | 2 |
| CLPX | Boulder Scientific Company | 0 | 2 |
| CLRX | Clayton Rail | 0 | 1 |
| CLSL | Columbia and Silver Creek Railroad | 3 | 0 |
| CLSU | CLSU | 0 | 1 |
| CLSX | Cargill Incorporated Salt Division | 0 | 291 |
| CLTZ | CLTZ | 0 | 3 |
| CM | Central Montana Rail Incorporated | 18 | 2 |
| CMAU | Compagnie Maritime d Affretement Compagnie Generale Maritime | 0 | 51 |
| CMBU | CMB SA | 0 | 5 |
| CMC | CMC Railroad Incorporated | 4 | 0 |
| CMCU | Crowley Maritime Corporation | 0 | 31 |
| CMCX | Sweetman Construction Company | 0 | 4 |
| CMCZ | Crowley Maritime Corporation | 0 | 5 |
| CMDX | Cargill Incorporated | 0 | 2 |
| CME | CME | 1 | 0 |
| CMER | CMER | 1 | 0 |
| CMEX | Cemex Inc | 2 | 56 |
| CMGN | Central Michigan RR | 19 | 1 |
| CMHX | CarMath Incorporated | 0 | 260 |
| CMIU | CMIU | 0 | 1 |
| CMIX | Consolidated Minerals Incorporated | 0 | 2 |
| CMN | CMN | 2 | 1 |
| CMNR | CMNR | 0 | 1 |
| CMNW | Chicago Missouri & Western | 56 | 3 |
| CMNX | CMNX | 0 | 1 |
| CMO | Chicago St Paul Minneapolis & Omaha | 2 | 872 |
| CMPA | Madison Railroad Division of City of Mad | 3 | 2 |
| CMPX | Compass Capitol Corporation | 0 | 33 |
| CMR | Indiana Rail Road Company | 4 | 1 |
| CMRR | Catskill Mountain Scenic | 6 | 12 |
| CMS | CMS | 1 | 2 |
| CMSL | Cape May Seashore Line | 10 | 6 |
| CMSX | Cahokia Marine Services | 3 | 0 |
| CMTV | CMTV | 1 | 0 |
| CMTX | CMTX | 0 | 3 |
| CMUU | Canada Maritime Agencies Limited | 0 | 9 |
| CMX | CMX | 0 | 1 |
| CMXX | CMXX | 1 | 0 |
| CN | Canadian National Railways | 2273 | 3820 |
| CNA | Canadian National Railways | 1 | 1664 |
| CNAX | CNAX | 0 | 1 |
| CNCX | CNCX | 0 | 3 |
| CNDX | Connecticut Department of Transportation | 3 | 0 |
| CNEU | Canadian National Railway | 0 | 2 |
| CNFX | CIT Group/Capital Finance, Inc | 0 | 13 |
| CNGU | Sicng (Ind. Chim. Du Nord de la Grece S.A.) | 0 | 8 |
| CNHX | Ontario Hydro | 0 | 1 |
| CNIS | Canadian National Railways | 0 | 445 |
| CNIU | Compagnia Chilena de Navigacion Interoceanica SA | 0 | 22 |
| CNJ | Central Rail Road of New Jersey | 128 | 62 |
| CNJW | CNJW | 1 | 3 |
| CNL | Columbia Newberry & Laurens | 1 | 3 |
| CNLX | CN Treasury Operations, Limited | 0 | 439 |
| CNOR | Cincinnati Northern | 0 | 1 |
| CNPU | Canadian National Railway | 0 | 3 |
| CNPZ | Canadian National Railway | 0 | 4 |
| CNR | CNR | 3 | 16 |
| CNRU | Canadian National Railway | 0 | 104 |
| CNRY | Cincinnati Railway | 2 | 2 |
| CNRZ | Canadian National Railway | 0 | 2 |
| CNSM | CNSM | 50 | 6 |
| CNSU | Compagnie Senegalaise de Navigation Maritime | 0 | 4 |
| CNSZ | CNSZ | 0 | 1 |
| CNTX | Continental Tank Car Corporation | 0 | 14 |
| CNUR | C and NC Railroad Corporation | 4 | 1 |
| CNVX | Convoyeur National Incorporated | 0 | 1 |
| CNW | Chicago & Northwestern | 1597 | 3898 |
| CNWX | Canadian Wheat Board | 0 | 260 |
| CNWZ | Chicago & Northwestern | 0 | 6 |
| CNX | CNX | 0 | 1 |
| CNY | CNY | 0 | 1 |
| CNYK | Central New York Locomotive Company | 1 | 0 |
| CNYX | Central New York Locomotive Co Inc. | 1 | 0 |
| CNZR | Central New England | 10 | 7 |
| CO | Chesapeake & Ohio | 709 | 615 |
| COA | COA | 1 | 0 |
| COAC | COAC | 0 | 1 |
| COAX | Trinity Rail Management | 0 | 90 |
| COBX | Cobre Mining Company Limited | 0 | 1 |
| COCX | Chevron Oronite Company LLC | 0 | 25 |
| COE | COE | 2 | 0 |
| COEH | Conecuh Valley Railroad | 5 | 231 |
| COEN | COEN | 0 | 1 |
| COER | Crab Orchard & Egyptian | 6 | 0 |
| COF | COF | 1 | 0 |
| COFG | COFG | 4 | 4 |
| COFM | COFM | 1 | 0 |
| COG | COG | 4 | 3 |
| COGENTRIX | COGENTRIX | 1 | 0 |
| COGX | Rail Connection, Inc. | 0 | 16 |
| COHX | COHX | 0 | 2 |
| COLAS | COLAS | 2 | 0 |
| COLASRAIL | COLASRAIL | 2 | 0 |
| COLO | COLO | 0 | 6 |
| COLONA | COLONA | 1 | 0 |
| COLU | COLU | 0 | 1 |
| COLX | Alliant Energy | 0 | 10 |
| COM | COM | 1 | 0 |
| COMET | COMET | 1 | 0 |
| COMX | Excelon Generation Company, LLC | 2 | 46 |
| CON | CON | 1 | 0 |
| CONN | CONN | 1 | 0 |
| CONT | CONT | 0 | 10 |
| CONW | Colorado & North Western | 0 | 1 |
| CONX | ConocoPhillips Company | 1 | 68 |
| COORS | COORS | 1 | 0 |
| COOX | First Union Rail | 1 | 0 |
| COP | City of Prineville Railway | 4 | 11 |
| COPR | COPR | 2 | 1 |
| COPU | Maas Intermodal Systems | 0 | 3 |
| COPX | CanadianOxy Industrial Chemicals Limited Partnership | 0 | 1 |
| CORDEIROPO | CORDEIROPO | 1 | 0 |
| CORP | Central Oregon & Pacific | 46 | 48 |
| CORX | Coors Brewing Company | 11 | 151 |
| COSX | Cabot Corporation CAB-O-SIL Division | 0 | 17 |
| COUH | COUH | 0 | 1 |
| COWAN | COWAN | 1 | 0 |
| COZ | CSX Transportation Incorporated (Chesapeake & Ohio) | 0 | 2 |
| CP | Canadian Pacific Railway | 2109 | 4031 |
| CPA | CPA | 1 | 4 |
| CPAA | Canadian Pacific Railway | 0 | 390 |
| CPAX | CITGO Petroleum Corporation | 0 | 3 |
| CPC | CPC | 2 | 0 |
| CPCX | Chevron Phillips Chemical Company | 1 | 54 |
| CPDR | Carolina Piedmont | 11 | 0 |
| CPDX | Chevron USA Incorporated | 0 | 99 |
| CPGX | CPGX | 0 | 6 |
| CPI | Canadian Pacific Railway | 0 | 7 |
| CPIU | Container Providers International | 0 | 4 |
| CPL | CPL | 1 | 0 |
| CPLT | CPLT | 0 | 1 |
| CPLX | CPLX Leasing Limited | 1 | 64 |
| CPMY | Coopersville & Marne Railway | 3 | 0 |
| CPOX | Consumers Power Company (Mich.) | 3 | 22 |
| CPP | CPP | 1 | 0 |
| CPPU | Canadian Pacific Railway | 0 | 16 |
| CPR | Canadian Pacific Railway | 16 | 34 |
| CPRN | CPRN | 1 | 0 |
| CPRR | CPRR | 2 | 0 |
| CPRX | Carolina Power and Light Company | 1 | 2 |
| CPSU | Hapag Lloyd Container Line | 0 | 197 |
| CPT | Canadian Pacific Railway | 0 | 10 |
| CPTM | Companhia Paulista de Trens Metropolitanos | 5 | 0 |
| CPVX | Cook Paint & Varnish | 0 | 1 |
| CPW | CPW | 1 | 0 |
| CPWX | Canadian Wheat Board | 0 | 398 |
| CQ | CQ | 2 | 0 |
| CQPA | Central Columbiana & Pennsylvania RR | 6 | 0 |
| CR | Conrail | 3751 | 7123 |
| CR7490 | CR7490 | 1 | 0 |
| CRAN | CRAN | 0 | 2 |
| CRBX | OmniSource Corporation | 0 | 4 |
| CRCC | CRCC | 1 | 0 |
| CRCX | Consolidated Rail Corporation | 0 | 4 |
| CRCZ | Norfolk Southern Railway Company | 0 | 2 |
| CRDX | Chicago Freight Car Leasing Company | 0 | 1429 |
| CREX | Citicorp Railmark, Inc | 0 | 6 |
| CRGX | Cargill Incorporated | 31 | 1266 |
| CRHA | CRHA | 16 | 11 |
| CRI | Chicago River & Indiana | 5 | 0 |
| CRIP | Chicago Rock Island & Pacific | 512 | 178 |
| CRIV | CRIV | 1 | 0 |
| CRIX | Citicorp Railmark, Inc. | 33 | 340 |
| CRL | Chicago Rail Link | 24 | 1 |
| CRLE | Coe Rail Incorporated | 6 | 916 |
| CRLG | CRLG | 0 | 1 |
| CRLU | Carlisle Leasing International | 0 | 26 |
| CRLX | Conrail Leasing Co | 10 | 0 |
| CRM | CRM | 1 | 0 |
| CRMU | Norfolk Southern Railway Company | 0 | 3 |
| CRMX | MHC Incorporated (Subsidiary of Conagra Incorporated) | 6 | 1 |
| CRMZ | Norfolk Southern Railway Company | 0 | 1 |
| CRN | Norfolk Southern Railway Company | 1 | 1 |
| CRNA | CRNA | 0 | 1 |
| CRNX | Coffeyville Resources Nitrogen Fertilize | 0 | 24 |
| CROX | CROX | 0 | 1 |
| CRPX | Centennial Gas Liquide LLC | 0 | 14 |
| CRR | Clinchfield | 77 | 60 |
| CRRM | CRRM | 0 | 1 |
| CRRR | CRRR | 2 | 0 |
| CRRX | Canon City and Royal Gorge Railroad LLC | 5 | 13 |
| CRRY | CRRY | 1 | 0 |
| CRS | Carolina Rail Service | 2 | 0 |
| CRSU | Cronos | 0 | 3 |
| CRSX | Cost Rail Service | 0 | 1 |
| CRSZ | CRSZ | 0 | 9 |
| CRT | CRT | 3 | 0 |
| CRTA | Cleveland Rapid Transit | 17 | 1 |
| CRXU | Cronos Containers (U.K.) | 0 | 241 |
| CRYX | Cryo-Trans Incorporated | 0 | 849 |
| CRZ | Conrail Trailer | 0 | 31 |
| CS | Colorado & Southern | 57 | 64 |
| CSAO | Conrail Shared Assets | 0 | 1 |
| CSBX | Cargill Incorporated Salt Division | 0 | 2 |
| CSC | CSC | 1 | 0 |
| CSCD | Cascade and Columbia River Railroad Company | 2 | 5 |
| CSCO | CSCO | 0 | 1 |
| CSCX | Coal Supply Corporation | 1 | 13 |
| CSD | CSD | 3 | 0 |
| CSDX | Metropolitan Water Reclamation District of Greater Chicago | 2 | 5 |
| CSHU | COSCO | 0 | 3 |
| CSIX | Cycle Systems Inc. | 1 | 1 |
| CSKX | Central States Grain & Trading Co. | 0 | 5 |
| CSL | Chicago Short Line Railway Company | 13 | 22 |
| CSLC | CSLC | 4 | 0 |
| CSLU | Commodore Shipping Co. Ltd | 0 | 2 |
| CSLX | CSLX | 0 | 10 |
| CSN | Companhia Siderúrgica Nacional | 0 | 3 |
| CSNX | Trident NGL Incorporated | 0 | 2 |
| CSOE | CSOE | 2 | 0 |
| CSOR | Connecticut Southern | 13 | 1 |
| CSOU | CSOU | 0 | 1 |
| CSOX | CITGO Petroleum Corporation | 0 | 7 |
| CSP | Camas Prairie RailNet Incorporated | 10 | 8 |
| CSQU | Hapag Lloyd Container Line | 0 | 19 |
| CSR | CSR | 5 | 0 |
| CSRLC | CSRLC | 1 | 0 |
| CSRLP | CSRLP | 1 | 0 |
| CSRP | CSRP | 1 | 0 |
| CSRR | Conway Scenic | 19 | 16 |
| CSRX | Conway Scenic Railroad | 12 | 10 |
| CSRY | CSRY | 0 | 1 |
| CSRZ | CSX Transportation Incorporated | 0 | 2 |
| CSS | Chicago South Shore And South Bend | 102 | 347 |
| CSSB | CSSB | 3 | 0 |
| CSSS | CSSS | 0 | 2 |
| CSSSB | CSSSB | 5 | 0 |
| CSSX | Cycle Systems Scrap | 1 | 1 |
| CSTX | Canada Starch Company Incorporated | 0 | 5 |
| CSU | CSU | 0 | 2 |
| CSUX | City of Colorado Springs Department of Electric Generation | 0 | 4 |
| CSVS | CSVS | 0 | 1 |
| CSW | CSW | 1 | 0 |
| CSX | CSX Transportation | 5975 | 16489 |
| CSX7811 | CSX7811 | 1 | 0 |
| CSXE | CSX Transportation Incorporated | 0 | 6 |
| CSXS | CSXS | 1 | 0 |
| CSXU | CSX Transportation Incorporated | 1 | 2784 |
| CSXX | CSXX | 0 | 1 |
| CSXZ | CSX Transportation Incorporated | 0 | 2 |
| CSYX | Bunge North America | 2 | 332 |
| CT | City of Columbia d/b/a Columbia Terminal | 2 | 3 |
| CTA | Chicago Transit Authority | 219 | 8 |
| CTC | CTC | 1 | 1 |
| CTCX | Endasa S.A. De C.V. | 0 | 267 |
| CTDOT | CTDOT | 1 | 0 |
| CTEX | CIT Group/Capital Finance, Inc | 1 | 3 |
| CTGX | CTGX | 0 | 1 |
| CTHX | CTHX | 0 | 1 |
| CTIE | Kansas City Southern Railway Company | 0 | 1 |
| CTIX | Southeastern Industrial Enterprises, Inc | 0 | 6 |
| CTIZ | CTI-Container Transport International Incorporated | 0 | 8 |
| CTK | CTK | 1 | 0 |
| CTL | CTL | 34 | 0 |
| CTM | CTM | 1 | 0 |
| CTML | Cairo Terminal Railroad Company | 2 | 0 |
| CTN | Canton Railroad Company | 9 | 9 |
| CTNX | CCC Transport Company | 0 | 24 |
| CTR | Clinton Terminal Railroad Company | 2 | 6 |
| CTRN | Union Pacific Railroad Company | 1 | 804 |
| CTRR | Cloquet Terminal Railroad Company | 4 | 28 |
| CTRW | Carlton Trail Railway Company | 1 | 4 |
| CTRX | Cargill, Inc. | 0 | 15 |
| CTS | Cumbres & Toltec Scenic | 13 | 7 |
| CTSX | CTS Cement Manufacturing Company | 0 | 15 |
| CTT | CTT | 0 | 1 |
| CTTX | TTX Company | 0 | 1 |
| CTV | CTV | 1 | 0 |
| CTVX | Cleveland Terminal and Valley Railway Incorporated | 0 | 3 |
| CTWX | CTWX | 0 | 18 |
| CTX | CTX | 0 | 1 |
| CUCU | CUCU | 0 | 1 |
| CUFT | CUFT | 0 | 1 |
| CUMB | CUMB | 0 | 2 |
| CUOH | Columbus and Ohio River Railroad Company | 0 | 126 |
| CUON | CUON | 0 | 1 |
| CUVA | ISG Cleveland Works Railway Company | 3 | 11 |
| CUX | CUX | 0 | 1 |
| CV | Central Vermont | 77 | 131 |
| CVAR | Cedar Valley Railroad | 1 | 0 |
| CVC | Canadian National Railways | 0 | 146 |
| CVGU | Cavanagh Services Group | 0 | 8 |
| CVGX | Caganagh Services Group, Inc | 0 | 27 |
| CVL | CVL | 2 | 0 |
| CVR | Cimarron Valley Railroad L.C. | 6 | 1 |
| CVRD | CVRD | 2 | 1 |
| CVRR | CVRR | 2 | 0 |
| CVRY | Caddo Valley Railroad Company | 1 | 0 |
| CVSR | Cuyahoga Valley Scenic RR | 17 | 9 |
| CVW | CVW | 0 | 1 |
| CVYR | Hargraves & McCrary, P.A. | 2 | 0 |
| CW | Colorado and Wyoming | 19 | 120 |
| CWBX | C.W. Brooks Incorporated | 0 | 20 |
| CWC | CWC | 0 | 1 |
| CWCX | Canandaigua Wine Company Incorporated | 1 | 4 |
| CWCY | Caldwell Country Railroad | 2 | 0 |
| CWE | CWE | 1 | 1 |
| CWEX | Midwest Generation LLC | 3 | 1478 |
| CWG | CWG | 1 | 0 |
| CWI | Chicago and Western Indiana | 6 | 5 |
| CWL | Cornwall Railroad | 9 | 2 |
| CWLU | CWLU | 0 | 1 |
| CWM | CWM | 0 | 2 |
| CWMW | CWMW | 0 | 1 |
| CWP | Chicago West Pullman & Southern | 14 | 11 |
| CWPS | CWPS | 0 | 1 |
| CWR | CWR Incorporated | 8 | 2 |
| CWRO | Cleveland Works Rail Operations | 24 | 4 |
| CWRX | CWRX | 0 | 5 |
| CWRY | Commonwealth Railway Inc. | 5 | 1 |
| CWSU | GCatainer BV | 0 | 6 |
| CWSX | Cardella Waste Service Of New Jersey | 0 | 22 |
| CWWR | CWWR | 2 | 0 |
| CX | CX | 0 | 2 |
| CXAX | CXAX | 1 | 0 |
| CXPZ | CSX Transportation Incorporated | 0 | 4 |
| CXRZ | CSX Transportation Incorporated | 0 | 3 |
| CXS | CXS | 1 | 0 |
| CXST | CXST | 0 | 1 |
| cydx | Conrad Yelvington Distributors | 3 | 80 |
| CYDZ | CYDZ | 21 | 0 |
| CYLU | Cho Yang Shipping Co. Ltd. | 0 | 3 |
| CYMX | Cytec Carbon Fibers LLC | 2 | 13 |
| CYPR | CYPR | 0 | 2 |
| CYRO | CYRO | 1 | 0 |
| CYSX | CYSX | 0 | 1 |
| CYTX | Construcciones Y Trituaraciones S.A. De C.V. | 0 | 1 |
| CYXX | Conrad Yelvington Distributors, Inc | 9 | 18 |
| CYZ | CYZ | 3 | 0 |
| CZCX | Crown Zellerbach Corporation | 0 | 1 |
| CZRC | CZRC | 0 | 2 |
| CZRY | Carrizo Gorge Railway Inc. | 3 | 0 |
| D | D | 6 | 3 |
| D0DX | D0DX | 0 | 1 |
| D1015 | D1015 | 1 | 0 |
| DA | Canadian Pacific Railway (Dominion Atlantic) | 1 | 0 |
| DACX | VIP Tank Services | 0 | 6 |
| DAFX | Department of Defence Troop Support and Aviation Material Re | 0 | 11 |
| DAIR | D and I Railroad Company | 30 | 5 |
| DAKR | Dakota Rail Incorporated | 3 | 1 |
| DAKX | DAK Americas LLC | 1 | 21 |
| DALT | Dallas Terminal Railway | 0 | 1 |
| DALZ | D and A Leasing Incorporated | 0 | 1 |
| DAMA | DAMA | 0 | 1 |
| DANX | ADM Transportation Company | 0 | 4 |
| DAPC | DAPC | 0 | 1 |
| DAPX | Dairyland Power Cooperative (Wis.) | 0 | 2 |
| DART | Dallas Area Rapid Transit | 31 | 2 |
| DAS | DAS | 0 | 2 |
| DASH | DASH | 1 | 0 |
| DAT | DAT | 1 | 1 |
| DATX | DATX Associates | 0 | 1 |
| DAVENPORT | DAVENPORT | 1 | 0 |
| DAVX | W. R. Grace and Company - Conn. Davison Chemical Division | 1 | 0 |
| DAWX | D.A. Walmsley and Company | 1 | 1 |
| DAX | Occidental Chemical Corporation | 0 | 12 |
| DAYU | Deutsche Afrika Linien GmbH | 0 | 1 |
| DB | Deutsche Bahn | 177 | 67 |
| DBCX | BASF Corporation | 0 | 129 |
| DBGX | Debruce Grain Inc. | 17 | 0 |
| DBI | DBI | 0 | 1 |
| DBIX | DBIX | 0 | 2 |
| DBRZ | DBRZ | 0 | 1 |
| DBUX | CIT Group/Capital Finance, Inc | 0 | 770 |
| DBWX | D.B. Western Inc - Texas | 0 | 1 |
| DBZ | DeBoer | 0 | 2 |
| DC | Delray Connecting Railroad Company | 2 | 3 |
| DCBX | Degussa Engineered Carbons, LP | 0 | 9 |
| DCCX | McDonnell Douglas Corporation | 0 | 6 |
| DCFB | Dodge City Ford and Bucklin Railroad Com | 1 | 0 |
| DCI | Des Moines & Central Iowa RR | 1 | 1 |
| DCIU | Dana Container Incorporated | 0 | 3 |
| DCLR | Delaware Coast Line RR Co | 8 | 5 |
| DCLX | Dow Chemical Canada Incorporated | 0 | 134 |
| DCON | Detroit Connecting | 2 | 0 |
| DCRR | Dubois County Railroad | 1 | 0 |
| DCSC | DCSC | 0 | 1 |
| DCT | DCT | 1 | 0 |
| DCTX | CIT Group/Capital Finance, Inc | 0 | 25 |
| DD | DD | 2 | 0 |
| DDDX | Frontier Cooperative Company | 4 | 0 |
| DDRX | DDRX | 0 | 11 |
| DDTX | DDTX | 0 | 1 |
| DE | DE | 11 | 0 |
| DEBZ | DEBZ | 0 | 2 |
| DEC | DEC | 1 | 0 |
| DEEX | Detroit Edison Company | 19 | 2743 |
| DEGX | Mississippi Power Company | 0 | 22 |
| DEI | DEI | 0 | 2 |
| DEIZ | DEIZ | 0 | 1 |
| DEKA | DeKalb Agra | 2 | 0 |
| DEKALB | DEKALB | 1 | 0 |
| DELTAWESTE | DELTAWESTE | 1 | 0 |
| DENTON | DENTON | 1 | 0 |
| DENVER | DENVER | 2 | 0 |
| DER | Dunn-Erwin | 1 | 0 |
| DES | DES | 0 | 1 |
| DESC | DESC | 0 | 1 |
| DETX | Detroit Edison Company | 0 | 629 |
| DEUTSCHE | DEUTSCHE | 1 | 0 |
| DFI | DFI | 1 | 0 |
| DFIU | Dole Fresh Fruit International Ltd. | 0 | 3 |
| DFSU | Dong Fang | 0 | 31 |
| DFTX | DTE Transportation Services Limited | 2 | 0 |
| DGCX | Dakota Gasification Company | 0 | 9 |
| DGG | DGG | 0 | 1 |
| DGHX | Searles Valley Minerals Operations, Inc. | 0 | 51 |
| DGNO | Dallas Garland & Northeastern | 23 | 15 |
| DGRW | DGRW | 0 | 3 |
| DGSZ | DGSZ | 0 | 1 |
| DGT | DGT | 0 | 1 |
| DGVR | DGVR | 4 | 0 |
| DH | Delaware & Hudson | 241 | 130 |
| DHCCO | DHCCO | 1 | 0 |
| DHMX | Mcm Management Corp | 1 | 0 |
| DHNY | Canadian Pacific (Delaware and Hudson Railway Company Incorp | 0 | 3 |
| DHRY | DHRY | 1 | 0 |
| DI | DI | 0 | 1 |
| DI3 | DI3 | 1 | 0 |
| DICX | Dry Ice Carbonic | 0 | 1 |
| DIM | DIM | 0 | 1 |
| DINE | DINE | 0 | 1 |
| DIR | DIR | 1 | 5 |
| DISNEYLAND | DISNEYLAND | 1 | 0 |
| DISX | DISX | 0 | 9 |
| DIZ | DIZ | 0 | 1 |
| DJJX | Joseph Transportation Incorporated | 0 | 245 |
| DJLX | CIT Group/Capital Finance, Inc | 0 | 153 |
| DJPX | Joseph Transportation Incorporated | 4 | 0 |
| DJRR | Decatur Junction | 0 | 1 |
| DJRY | DJRY | 0 | 1 |
| DJTX | Joseph Transportation Incorporated | 0 | 54 |
| DKPX | Duke Power | 4 | 178 |
| DL | Delaware-Lackawanna Railroad Company | 48 | 22 |
| DLA | DLA | 3 | 1 |
| DLCX | Diesel Locomotive Co LLC | 6 | 1 |
| DLDX | Asphalt Products & Consulting, Inc | 0 | 6 |
| DLG | DLG | 1 | 0 |
| DLI | DLI | 0 | 1 |
| DLM | DLM | 2 | 0 |
| DLMV | DLMV | 0 | 1 |
| DLMX | Daylight Locomotives and Machine Works Incorporated | 7 | 6 |
| DLPX | Degussa Canada Limited | 0 | 6 |
| DLR | DLR | 1 | 0 |
| DLRX | General Electric Rail Services | 0 | 323 |
| DLSX | Diesel Supply Company Incorporated | 6 | 0 |
| DLTD | DLTD | 0 | 1 |
| DLW | Delaware Lackawanna & Western | 23 | 40 |
| DLWR | Depew Lancaster and Western Railroad Com | 3 | 13 |
| DLWX | D.L. and W. Incorporated | 0 | 1 |
| DM | Detroit & Mackinac | 21 | 26 |
| DMCI | Des Moines & Central Iowa RR | 4 | 0 |
| DME | Dakota, Minnesota and Eastern | 108 | 1641 |
| DMEX | DMEX | 0 | 1 |
| DMHX | Davenport Mammoet LLC | 0 | 2 |
| DMIR | Duluth Missabe & Iron Range | 120 | 296 |
| DMIX | ADM Transportation Company | 0 | 501 |
| DMLX | General Electric Rail Services | 0 | 4 |
| DMM | Dansville and Mount Morris Railroad Comp | 0 | 81 |
| DMN | DMN | 0 | 6 |
| DMNR | DMNR | 1 | 0 |
| DMVW | Dakota Missouri Valley and Western Railr | 22 | 14 |
| DMX | DMX | 0 | 3 |
| DNAX | Dana Railcare | 0 | 40 |
| DNE | Duluth and Northeastern Railroad Company | 8 | 7 |
| DNHX | DNHX | 0 | 1 |
| DNM | DNM | 1 | 1 |
| DO | Delaware Otsego | 3 | 2 |
| DOC | DOC | 2 | 0 |
| DOCX | Du Pont Canada Incorporated | 0 | 3 |
| DOD | DOD | 1 | 0 |
| DODX | Department Of Defense | 1 | 492 |
| DOE | DOE | 1 | 0 |
| DOFASCO | DOFASCO | 1 | 0 |
| DOLX | Dolese Bros. Company | 0 | 3 |
| DOME | DOME | 0 | 1 |
| DONG | DONG | 0 | 1 |
| DONX | Donnelly Commodities Inc. | 0 | 6 |
| DOPRAVA | DOPRAVA | 2 | 0 |
| DOT | DOT | 7 | 2 |
| DOTX | USDOT/Federal Railroad Administration | 14 | 11 |
| DOUB | DOUB | 0 | 1 |
| DOVE | DOVE | 0 | 4 |
| DOWX | Dow Chemical Company | 0 | 1478 |
| DPCX | Dragon Phosphate Company | 0 | 18 |
| DPIX | Dufour Petroleum Incorporated | 0 | 8 |
| DPM | DPM | 4 | 0 |
| DPMO | DPMO | 2 | 0 |
| DPP | DPP | 128 | 5 |
| DPS | DPS | 1 | 0 |
| DQE | De Queen and Eastern Railroad Incorporat | 6 | 0 |
| DR | Dardanelle and Russellville Railroad Inc | 14 | 3 |
| DRCX | Denver Railway Car Co | 0 | 4 |
| DREX | Wilmot Transportation and Logistics | 0 | 58 |
| DRG | DRG | 5 | 7 |
| DRGU | DRGU | 0 | 20 |
| DRGW | Denver & Rio Grande Western | 273 | 1038 |
| DRHY | Durham Transport Incorporated | 1 | 0 |
| DRI | Davenport Rock Island and North Western | 17 | 1 |
| DRIN | DRIN | 0 | 3 |
| DRINW | DRINW | 3 | 0 |
| DRIR | Denver Rock Island Railroad | 4 | 0 |
| DRM | DRM | 0 | 1 |
| DRMX | Danbury Railway Museum Incorporated | 2 | 4 |
| DRMY | DRMY | 1 | 0 |
| DRPA | DRPA | 4 | 0 |
| DRR | DRR | 5 | 0 |
| DRS | DRS | 9 | 1 |
| DRSX | DOT Rail Services | 8 | 1 |
| DRT | DRT | 1 | 0 |
| DRTZ | Dart Intermodal Incorporated | 0 | 18 |
| DRYU | DRYU | 0 | 1 |
| DS | Durham & Southern | 18 | 7 |
| DSB | DSB | 2 | 0 |
| DSBR | DSBR | 1 | 2 |
| DSCU | Diamond Shipping Co. Ltd. | 0 | 1 |
| DSCZ | DSCZ | 0 | 1 |
| DSDX | Dairy Shippers Despatch Co. | 0 | 3 |
| DSEU | DSEU | 0 | 65 |
| DSEX | East Carbon Development Company | 0 | 44 |
| DSG | DSG | 1 | 0 |
| DSGC | DSGC | 1 | 0 |
| DSIX | Dowell Schlumberger Incorporated | 1 | 44 |
| DSL | Denver & Salt Lake | 1 | 2 |
| DSLX | DeGussa Corporation | 3 | 4 |
| DSNG | Durango & Silverton Narrow Gauge Railroa | 15 | 18 |
| DSP | DSP | 1 | 0 |
| DSPP | Denver, South Park & Pacific RR | 1 | 0 |
| DSRC | Dakota Southern Railway Company | 8 | 39 |
| DSRL | DSRL | 1 | 0 |
| DSRR | Delta Southern RR | 8 | 1 |
| DSRX | DSRX | 2 | 3 |
| DSSA | Duluth, South Shore & Atlantic | 1 | 7 |
| DSSX | Detroit Salt Company, L.C. | 0 | 214 |
| DSWX | DSWX | 0 | 1 |
| DT | Decatur Junction Railway Company | 3 | 4 |
| DT1 | Detroit Terminal | 11 | 1 |
| DTA | DTA | 6 | 0 |
| DTCX | DTE Coal Services | 0 | 200 |
| DTDX | DTDX | 0 | 1 |
| DTE | DTE | 3 | 0 |
| DTEX | Dresser Transportation Equipment Division Dresser Industries | 1 | 0 |
| DTFR | DTFR | 1 | 0 |
| DTFW | DTFW | 1 | 0 |
| DTGW | DTGW | 1 | 0 |
| DTI | Detroit Toledo & Ironton | 78 | 96 |
| DTL | DTL | 0 | 2 |
| DTLX | Delta Tank Line Company | 0 | 33 |
| DTR | DTR | 2 | 0 |
| DTRS | DTRS | 0 | 1 |
| DTS | Detroit & Toledo ShoreLine | 5 | 32 |
| DTSL | Detroit & Toledo Shore Line | 14 | 3 |
| DTTX | TTX Company | 0 | 11409 |
| DU | DU | 3 | 0 |
| DUKE | DUKE | 3 | 1 |
| DUKX | Dupps Company | 0 | 2 |
| DUNSMUIR | DUNSMUIR | 1 | 0 |
| DUPONT | DUPONT | 1 | 0 |
| DUPX | Du Pont De Nemours and Company Incorporated | 2 | 376 |
| DUR | DUR | 1 | 0 |
| DURR | DURR | 4 | 1 |
| DUT | Denver Union Terminal Railway Company | 1 | 0 |
| DUVAL | DUVAL | 1 | 0 |
| DV | Delaware Valley Railway Company | 2 | 0 |
| DVGR | DVGR | 1 | 0 |
| DVK | DVK | 0 | 1 |
| DVLX | SULCOM, Inc | 0 | 29 |
| DVNZ | DVNZ | 0 | 1 |
| DVRR | DVRR | 1 | 0 |
| DVRU | Dover Limited | 0 | 9 |
| DVS | Delta Valley and Southern Railway Compan | 0 | 5 |
| DW | DW | 1 | 0 |
| DWC | Canadian National Railways | 0 | 574 |
| DWCR | DWCR | 0 | 1 |
| DWP | Duluth Winnipeg & Pacific | 28 | 17 |
| DWR | Deseret Western | 2 | 0 |
| DWRR | DWRR | 4 | 0 |
| DXC | DXC | 2 | 0 |
| DYLX | Transportation Equipment Incorporated | 0 | 1 |
| E | E | 1 | 0 |
| E6043 | E6043 | 1 | 0 |
| EA | EA | 1 | 0 |
| EACH | East Camden and Highland | 4 | 1 |
| EAFU | EAFU | 0 | 1 |
| EAFX | Rail Logistics | 0 | 70 |
| EAGX | Eaglebrook Incorporated | 0 | 77 |
| EAMX | Everest Railcar Services, Inc | 0 | 80 |
| EARY | Eastern Alabama Railway | 3 | 0 |
| EAST | EAST | 2 | 0 |
| EASU | Waterfront Container Leasing Company Incorporated | 0 | 3 |
| EBAX | Albemarle Corporation | 1 | 7 |
| EBBX | SouthEast Railroad Supply | 7 | 0 |
| EBL | East Branch & Lincoln RR | 2 | 0 |
| EBPX | Empire Builder Private Cars | 0 | 2 |
| EBR | EBR | 1 | 0 |
| EBT | East Broad Top | 17 | 90 |
| EBTX | English Boiler & Tube | 0 | 1 |
| EC | EC | 1 | 0 |
| ECBR | East Cooper and Berkeley Railroad Company | 7 | 0 |
| ECC | ECC | 1 | 1 |
| ECCU | East Carbon Development Co.(refuse) | 0 | 11 |
| ECCX | Ethyl Canada Incorporated | 0 | 1 |
| ECDX | Ethyl Corporation | 0 | 2 |
| ECGX | Alabama Power Company | 0 | 4 |
| ECLX | Erco Worldwide (USA) Inc. | 0 | 22 |
| ECMU | CMA-CGM | 0 | 214 |
| ECOX | Eco East | 0 | 4 |
| ECOZ | Ecorail Incorporated | 0 | 2 |
| ECQX | Degussa Engineered Carbons, LP | 0 | 35 |
| ECR | ECR | 4 | 0 |
| ECRX | Econo-Rail Corp. | 35 | 0 |
| ECTX | ECTX | 0 | 1 |
| ECUX | Exxon Mobil Corporation | 0 | 551 |
| ECXX | East Carbon Development Company | 1 | 104 |
| ED | ED | 8 | 0 |
| EDC | EDC | 0 | 1 |
| EDCX | El Dorado Chemical Company | 0 | 13 |
| EDEX | Empire District Electric Company | 1 | 4 |
| EDGEWATER | EDGEWATER | 2 | 0 |
| EDGX | Alliant Energy | 1 | 267 |
| EDM | EDM | 1 | 0 |
| EDW | El Dorado and Wesson Railway Company | 2 | 0 |
| EDZX | Envases de Zacatecas S.A. de C.V. | 0 | 1 |
| EE | Ellis and Eastern Company | 5 | 11 |
| EEC | East Erie Commercial Railroad | 2 | 1240 |
| EEFX | EEFX | 0 | 4 |
| EELX | General Electric Rail Services Corporation | 0 | 1 |
| EER | EER | 4 | 0 |
| EF | EF | 3 | 0 |
| EFA | Estrada de Ferro Amapa | 0 | 4 |
| EFC | Estrada de Ferro Carajas | 14 | 4 |
| EFCB | Estrada de Ferro Central do Brasil | 8 | 0 |
| EFCX | Evergreen Freight Car Company | 0 | 3 |
| EFOM | EFOM | 1 | 1 |
| EFRR | Effingham Railroad | 1 | 0 |
| EFVM | Estrada de Ferro Vitoria-Minas | 385 | 51 |
| EFX | EFX | 1 | 0 |
| EG | EG | 1 | 0 |
| EGF | EGF | 3 | 0 |
| EGHU | Evergreen International (USA) | 0 | 14 |
| EGLZ | EGLZ | 0 | 3 |
| EGSX | Entergy Gulf States Incorporated | 0 | 21 |
| EGTU | Refuse | 0 | 2 |
| EHSX | Essex Hybrid Seed Company Incorporated | 0 | 19 |
| EHV | EHV | 0 | 1 |
| EI | EI | 0 | 9 |
| EIRC | Eastern Illinois Railroad Company | 3 | 0 |
| EIRR | Eastern Idaho Railroad Incorporated | 14 | 2 |
| EISU | Evergreen International (USA) | 0 | 238 |
| EJ | EJ | 1 | 4 |
| EJE | Elgin Joliet and Eastern | 131 | 1412 |
| EJL | EJL | 2 | 0 |
| EJR | East Jersey Railroad and Terminal | 1 | 0 |
| EJS | East Jordan & Southern | 1 | 1 |
| EKLU | K Line | 0 | 1 |
| EKW | EKW | 7 | 0 |
| EL | Erie Lackawanna | 472 | 187 |
| ELCX | Eli Lilly and Company | 0 | 5 |
| ELFX | Electric Fuels Corporation (Fla.) | 1 | 137 |
| ELK | ELK | 1 | 0 |
| ELKR | Elk River Railroad Incorporated | 5 | 0 |
| ELKX | Elkem Metals Company | 0 | 4 |
| ELLIOT | ELLIOT | 1 | 0 |
| ELOU | Esmeralda Leasing SA Panama | 0 | 1 |
| ELOX | Elcon Inc. | 2 | 0 |
| ELP | ELP | 0 | 2 |
| ELS | Escanaba and Lake Superior Railroad Comp | 34 | 77 |
| ELSX | Kentucky May Coal Company Incorporated | 1 | 0 |
| ELTX | BP Solvay Polyethylene North America | 0 | 155 |
| ELZ | ELZ | 0 | 6 |
| EM | Edgemoor & Manetta | 3 | 0 |
| EMAX | EMAS | 0 | 1 |
| EMC | EMC | 4 | 0 |
| EMCO | EMCO | 14 | 4 |
| EMCU | Evergreen Marine Corporation | 0 | 404 |
| EMCX | EMCX | 1 | 0 |
| EMCZ | Evergreen International (USA) Corporation | 0 | 8 |
| EMD | Electro Motive Leasing | 7 | 2 |
| EMDX | EMD | 373 | 2 |
| EMHP | EMHP | 0 | 1 |
| EMHU | EMP | 0 | 2826 |
| EML | EML | 1 | 0 |
| EMLX | Electro-motive Leasing | 42 | 0 |
| EMMA | EMMA | 1 | 0 |
| EMPIRE | EMPIRE | 1 | 0 |
| EMPU | REZ-1 | 0 | 888 |
| EMPX | Empiregas Equipment Corporation | 0 | 1 |
| EMRU | Errani Masetti Ec. SRL | 0 | 9 |
| EMSR | EMSR | 2 | 0 |
| EMU | EMU | 0 | 1 |
| EMWU | Equipment Management Pool | 0 | 88 |
| EN | Esquimalt & Nanaimo | 0 | 2 |
| ENDX | GATX de Mexico SA de CV | 0 | 35 |
| ENDZ | ENDZ | 0 | 1 |
| ENEX | ENEX | 0 | 1 |
| ENGLISH | ENGLISH | 1 | 0 |
| ENGX | Englehard Corporation | 0 | 158 |
| ENGZ | ENGZ | 0 | 83 |
| ENR | E and N Railway Company Limited | 8 | 0 |
| ENSZ | Norfolk Southern Railway Company | 0 | 51 |
| ENVU | TWS Transportmittel Vermietung GmbH | 0 | 4 |
| ENVX | EnergySolutions LLC | 0 | 15 |
| ENXD | ENXD | 0 | 1 |
| ENXX | Enx Inc | 0 | 1 |
| EOLU | Exim Container Services Pte Ltd | 0 | 1 |
| EOLX | EOLX | 1 | 0 |
| EP | EP | 1 | 0 |
| EPAX | Exxon Mobil Corporation | 0 | 19 |
| EPCX | Enterprise Products Company | 0 | 10 |
| EPEZ | EPEZ | 0 | 1 |
| EPIC | EPIC | 0 | 1 |
| EPIU | Epic | 0 | 56 |
| EPIX | EPIC | 0 | 70 |
| EPLX | Eagle Picher | 1 | 0 |
| EPRR | EPRR | 0 | 2 |
| EPRY | East Penn Railway | 12 | 8 |
| EPS | EPS | 0 | 1 |
| EPTC | East Portland Traction | 3 | 1 |
| EPTX | Elk Point Transportation Co., LLC | 0 | 1 |
| EPXX | EPXX | 3 | 0 |
| EQQX | EQQX | 0 | 1 |
| EQSX | EQSX | 0 | 3 |
| EQUX | Equistar Chemicals, LP | 0 | 624 |
| ER | Eesti Raudtee | 23 | 1 |
| ERCX | EXCEL Railcar Corporation | 1 | 74 |
| ERDX | Merchants Despatch Transportation Corp. | 0 | 1 |
| ERES | Erie Western | 6 | 4 |
| ERGX | Hudson Logistics | 0 | 7 |
| ERIE | Erie Railroad | 28 | 42 |
| ERLX | General Electric Rail Services | 0 | 5 |
| ERS | ERS | 3 | 0 |
| ERSX | EXCEL Railcar Corporation | 0 | 3 |
| ES | ES | 1 | 0 |
| ESC | ESC | 2 | 0 |
| ESCX | General American Marks Company | 0 | 14 |
| ESDC | ESDC | 1 | 0 |
| ESDX | Equipment Services Of Delaware, Llc | 0 | 2 |
| ESHR | Eastern Shore Railroad | 9 | 10 |
| ESIX | Envirosolutions Inc | 0 | 45 |
| ESMB | ESMB | 0 | 41 |
| ESMX | ESMX | 0 | 2 |
| ESNA | Eureka Springs and North Arkansas | 4 | 2 |
| ESPN | ESPN | 5 | 0 |
| ESPU | Emirates Shipping Line | 0 | 1 |
| ESSO | ESSO | 1 | 0 |
| ESSU | K Line | 0 | 2 |
| ESTZ | ESTZ | 0 | 2 |
| ET | ET | 1 | 12 |
| ETCX | Eastman Tennessee Corporation | 3 | 258 |
| ETF | ETF | 1 | 0 |
| ETI | ETI | 2 | 0 |
| ETL | Essex Terminal Railway Company | 11 | 2 |
| ETMX | Etarco Rail Services Inc. | 0 | 1 |
| ETR | ETR | 3 | 2 |
| ETRX | Arkansas Power and Light Company | 0 | 155 |
| ETRY | Eastern TN Railway | 4 | 0 |
| ETSZ | Alliance Shippers Inc. | 0 | 1 |
| ETTX | TTX Company-Autoracks | 0 | 4290 |
| ETV | ETV | 1 | 0 |
| ETWC | ETWC | 1 | 0 |
| ETWNC | ETWNC | 2 | 0 |
| ETXX | ETXX | 0 | 1 |
| EUCX | EUCX | 0 | 1 |
| EUKA | EUKA | 3 | 0 |
| EURO | Eurostar | 1 | 0 |
| EURU | Eurotainer SA | 0 | 1 |
| EUSX | Exxon Mobil Corporation | 0 | 14 |
| EUX | EUX | 1 | 0 |
| EV | Everett Railroad | 9 | 9 |
| EVERETT | EVERETT | 1 | 0 |
| EVEX | EVEX | 0 | 4 |
| EVR | Estonian Rwys | 18 | 0 |
| EVWR | Evansville Western Railroad Inc | 12 | 0 |
| EW | EW | 2 | 0 |
| EWA | EWA | 1 | 0 |
| EWR | Elkhart & Western Railroad Co. | 1 | 0 |
| EWS | English Welsh and Scottish | 110 | 0 |
| EWSX | Indianapolis Power & Light | 2 | 14 |
| EX | EX | 2 | 1 |
| EX-CD | EX-CD | 2 | 0 |
| EX-PS | EX-PS | 1 | 0 |
| EX-S | EX-S | 0 | 1 |
| EXEX | Commonwealth Edison Company | 0 | 331 |
| EXFU | EXSIF Worldwide, Inc. | 0 | 11 |
| EXIZ | EXIZ | 0 | 1 |
| EXLA | EXLA | 0 | 1 |
| EXLU | Exel | 0 | 9 |
| EXLZ | EXLZ | 0 | 51 |
| EXMX | Express Marco Incorporated | 0 | 1 |
| EXXU | EXSIF Worldwide, Inc. | 0 | 2 |
| EZZ | EZZ | 0 | 4 |
| F7 | F7 | 2 | 0 |
| FA | FA | 2 | 0 |
| FABLOK | FABLOK | 2 | 0 |
| FAIRMONT | FAIRMONT | 2 | 0 |
| FAIX | FAIX Leasing | 11 | 0 |
| FALCON | FALCON | 1 | 0 |
| FALU | Foss Alaska Line Inc. | 0 | 1 |
| FALX | Falk Corporation | 0 | 1 |
| FARMLAND | FARMLAND | 1 | 0 |
| FARMWAY | FARMWAY | 1 | 0 |
| FARX | Farmers Cooperative Company | 2 | 0 |
| FBIU | Florens Container Services | 0 | 1 |
| FBLU | Florens Container Services | 0 | 51 |
| FBOX | TTX Company | 0 | 805 |
| FBPX | FBPX | 0 | 2 |
| FBXU | Flex-Box Limited | 0 | 3 |
| FC | Fulton County Railroad Incorporated | 8 | 1 |
| FCA | Ferrovia Centro Atlantica | 153 | 29 |
| FCC | Flagg Coal Co. | 2 | 1 |
| FCCA | FCCA | 3 | 0 |
| FCCH | FCCH | 1 | 0 |
| FCCM | Compania de Ferrocarriles Chiapas Mayab | 10 | 90 |
| FCCX | Foxley Cattle Company | 2 | 0 |
| FCEN | Florida Central | 21 | 34 |
| FCEX | Cenex Harvest States Cooperative | 0 | 2 |
| FCIU | Florens | 0 | 106 |
| FCLM | FCLM | 1 | 0 |
| FCM | Ferrocarriles Nacionales de Mexico | 19 | 5 |
| FCOX | FLO CO2 Incorporated | 0 | 1 |
| FCP | Ferrocarril Del Pacifico | 23 | 38 |
| FCPZ | National Railways of Mexico (Ferrocarriles Nacionales) | 0 | 1 |
| FCR | Fulton County Railraod | 4 | 0 |
| FCRD | First Coast Railway | 3 | 73 |
| FCRK | Falls Creek RR | 3 | 0 |
| FCRV | FCRV | 1 | 0 |
| FCSU | Trans Container Leasing AG | 0 | 1 |
| FCTU | FCTU | 0 | 1 |
| FCTX | Farmers Commodities Transportation | 0 | 130 |
| FDDM | Fort Dodge Des Moines & Southern | 7 | 11 |
| FDP | Ferrocarril de Panama | 4 | 0 |
| FDS | FDS | 0 | 1 |
| FDZ | FDZ | 0 | 1 |
| FEC | Florida East Coast | 127 | 2461 |
| FECU | Yamashita-Shinnihon Line | 0 | 1 |
| FECZ | Florida East Coast Railway Company | 0 | 60 |
| FEDZ | Federal Express | 0 | 13 |
| FEGZ | FEGZ | 0 | 2 |
| FEIX | Farmers Elevator Incorporated of Grace City | 0 | 1 |
| FENO | FENO | 0 | 28 |
| FENOCO | FENOCO | 9 | 0 |
| FEPA | FEPA | 0 | 2 |
| FEPASA | Ferrovias Paulistas SA | 2 | 0 |
| FEPSA | FEPSA | 5 | 0 |
| FEPX | FirstEnergy Generation Corp | 0 | 1356 |
| FERD | FERD | 1 | 0 |
| FERROMEX | FERROMEX | 1 | 0 |
| FERROPAR | FERROPAR | 1 | 0 |
| FERTAGUS | FERTAGUS | 1 | 0 |
| FESU | Far Eastern Shipping Company | 0 | 6 |
| FEVR | Fremont & Elkhorn Valley Railroad | 2 | 5 |
| FEX | FEX | 1 | 0 |
| FEXZ | Florida Express Carriers Inc. | 0 | 6 |
| FFEZ | Frozen Food Express | 0 | 32 |
| FFFZ | Flexi-Van Leasing Incorporated | 0 | 1 |
| FFGC | FFGC | 1 | 0 |
| FFIX | Procor Limited | 0 | 1 |
| FFTX | Florida Fun Train | 2 | 1 |
| FGC | Florida Gulf Coast Railroad Museum | 3 | 1 |
| FGCM | FGCM | 1 | 0 |
| FGCX | Florida Gulf Coast Railroad Museum Incorporated | 6 | 3 |
| FGE | FGE | 1 | 0 |
| FGEC | FGEC | 1 | 0 |
| FGER | Fruit Growers Express Company | 0 | 5 |
| FGEX | Fruit Growers Express | 0 | 12 |
| FGGX | Farmers Grain Co-Operative | 0 | 4 |
| FGLK | Finger Lakes Railway | 17 | 108 |
| FGLX | Factor Gas Liquids Incorporated | 0 | 1 |
| FGM | FGM | 4 | 0 |
| FGMR | Fruit Growers Express Company | 0 | 8 |
| FGMX | Grain Inspection Packers | 0 | 1 |
| FGRM | FGRM | 1 | 0 |
| FGW | First Great Western | 49 | 0 |
| FGWX | Federal Grain Inspection Service (USDA) (Scale Test Cars) | 1 | 7 |
| FHIX | Fruit Growers Express | 0 | 1 |
| FHP | FHP | 1 | 0 |
| FHPX | Fort Howard Paper | 4 | 0 |
| FHRX | Flint Hills Resources, Inc | 0 | 1 |
| FI | FI | 2 | 0 |
| FICX | Frontier Industrial Corp | 0 | 6 |
| FIMX | Franklin Industrial Minerals | 5 | 0 |
| FINX | Total Petrochemicals USA, Inc. | 0 | 89 |
| FIR | Flats Industrial Railroad Company | 2 | 0 |
| FIRR | FIRR | 1 | 0 |
| FIRSTCC | FIRSTCC | 9 | 0 |
| FIRSTHT | FIRSTHT | 2 | 0 |
| FIT | FIT | 3 | 1 |
| FITZGERALD | FITZGERALD | 1 | 0 |
| FJG | FJG | 1 | 4 |
| FL | FL | 6 | 0 |
| FLAG | FLAG | 1 | 0 |
| FLAGG | FLAGG | 2 | 0 |
| FLAX | Flexsys America L.P. | 0 | 2 |
| FLCX | CIT Group/Capital Finance, Inc | 0 | 146 |
| FLD | FLD | 0 | 2 |
| FLFX | Farmland Foods, Inc. | 0 | 2 |
| FLGZ | Flexi Van Leasing | 0 | 1 |
| FLIX | Greenbrier Management Services LLC | 0 | 50 |
| FLJX | Big West Oil Company | 1 | 0 |
| FLNX | R.P. Flynn Incorporated d/b/a Ohio Railway Supply | 4 | 2 |
| FLOX | CIT Group/Capital Finance, Inc | 0 | 227 |
| FLR | Fife Lake Railway | 1 | 1 |
| FLRX | ADM Transportation Company | 0 | 49 |
| FLSX | Great Miami Incorporated | 2 | 0 |
| FLWBS | FLWBS | 3 | 0 |
| FLXZ | Flexi-Van Leasing Incorporated | 0 | 7 |
| FM | FM | 2 | 0 |
| FMG | FMG | 10 | 0 |
| FMID | Florida Midland Railroad Company Incorpo | 6 | 1 |
| FMLX | FMC Corporation | 1 | 315 |
| FMPU | FMPU | 0 | 1 |
| FMRC | FarmRail | 28 | 1 |
| FMWX | FMWX | 2 | 0 |
| FNB | Ferronorte Brasil | 2 | 0 |
| FNC | FNC | 0 | 1 |
| FNLZ | FNLZ | 0 | 3 |
| FNM | Ferrocarriles Nacionales de Mexico | 93 | 90 |
| FNOR | Florida Northern | 1 | 0 |
| FNP | FNP | 0 | 2 |
| FNTX | Ferronet Sa De Cv | 0 | 1 |
| FOBX | Forbo Adhesives, LLC | 0 | 3 |
| FORD | FORD | 0 | 1 |
| FP | Fordyce & Princeton Railroad Company | 2 | 37 |
| FPAX | Formosa Transrail Corporation | 0 | 362 |
| FPBX | International Paper Corporation | 0 | 51 |
| FPCX | Oxy Vinyls LP | 0 | 11 |
| FPD7 | FPD7 | 1 | 0 |
| FPE | Fairport, Painesville & Eastern R.R. Co | 4 | 0 |
| FPEC | FPEC | 0 | 2 |
| FPPX | Fayette Power Project (Texas) | 0 | 154 |
| FPTX | Ferrous Processing and Trading Company | 0 | 39 |
| FRA | Federal Railroad Administration | 5 | 4 |
| FRANCE | FRANCE | 1 | 0 |
| FRCZ | FRCZ | 0 | 1 |
| FRD | FRD | 0 | 1 |
| FRDN | H and S Railroad Company Incorporated | 1 | 2 |
| FRDX | FRDX | 2 | 0 |
| FREI | FREI | 0 | 1 |
| FREIGHTCOR | FREIGHTCOR | 2 | 0 |
| FREIGHTLIN | FREIGHTLIN | 33 | 0 |
| FRIE | FRIE | 0 | 5 |
| FRIS | FRIS | 0 | 1 |
| FRISCO | FRISCO | 2 | 0 |
| FRIT | Frit Equipment | 1 | 0 |
| FRKX | Florida Rock Industries | 1 | 8 |
| FRLU | Farrell Lines Incorporated | 0 | 6 |
| FRMC | FRMC | 1 | 0 |
| FRR | Falls Road Railroad Company Incorporated | 1 | 1 |
| FRRHS | Fennimore Railroad Historical Society | 1 | 0 |
| FRTX | Farm-City Transport Incorporated | 0 | 13 |
| FRV | FRV | 3 | 0 |
| FRVR | Fox River Valley Railroad | 18 | 4 |
| FRVT | Fore River Transportation Corporation | 6 | 1 |
| FRW | Feather River & Western | 1 | 0 |
| FRYX | Federated Railways Inc | 0 | 13 |
| FS | FS | 18 | 1 |
| FSC | Farmland ServiceCOOP | 1 | 0 |
| FSCU | Florens Container Services Co. Ltd. | 0 | 638 |
| FSD | FSD | 1 | 0 |
| FSFT | FSFT | 0 | 1 |
| FSLT | FSLT | 1 | 0 |
| FSM | FSM | 1 | 0 |
| FSR | Fort Smith Railroad Company | 5 | 11 |
| FSRR | FerroSur | 61 | 95 |
| FSSX | F S Transportation LLC | 0 | 1 |
| FSTU | Fastrac Intermodal LLC | 0 | 114 |
| FSTX | Fuel Supply Trust | 0 | 252 |
| FSTZ | Fastrac Intermodal LLC | 0 | 710 |
| FTEX | FTEX | 0 | 1 |
| FTLX | FTLX | 0 | 4 |
| FTR | Florida Tri-Rail | 0 | 1 |
| FTRL | Foster Townsend Rail Logistics | 2 | 0 |
| FTSX | Fairmont Tamper | 2 | 39 |
| FTTX | TTX Company | 0 | 288 |
| FTVM | FerroValle | 29 | 0 |
| FTZX | FTZX | 0 | 1 |
| FURX | First Union Rail | 249 | 1941 |
| FUS | Ferrocarriles Nacionales de Mexico | 3 | 3 |
| FUXR | FUXR | 1 | 0 |
| FVGS | FVGS | 0 | 1 |
| FVM | FVM | 0 | 6 |
| FW | Fillmore & Western | 2 | 1 |
| FWC | FWC | 1 | 0 |
| FWCR | Florida West Coast Railroad Incorporated | 3 | 1 |
| FWD | Fort Worth & Denver | 9 | 25 |
| FWHS | FWHS | 1 | 0 |
| FWR | Fairmont & Western | 1 | 0 |
| FWRY | Fillmore Western Railway Company | 4 | 5 |
| FWTX | FWTX | 0 | 1 |
| FWWR | Fort Worth and Western | 31 | 5 |
| FWWV | FWWV | 1 | 1 |
| FWX | FWX | 0 | 2 |
| FXE | Ferromex | 532 | 448 |
| G-8 | G-8 | 1 | 0 |
| GA | Georgia Railroad | 29 | 18 |
| GAAB | Georgia and Alabama Division South Carolina Central Railroad | 3 | 0 |
| GABX | General American Marks Company | 0 | 81 |
| GACX | General American Marks Company | 0 | 2310 |
| GADX | SAB Trucking, Inc | 0 | 54 |
| GAEX | General American Marks Company | 0 | 16 |
| GALT | GALT | 0 | 1 |
| GALX | Georgia Power Company | 1 | 86 |
| GAMX | Arrendadora Nacional De Carros De Ferrocaril | 0 | 98 |
| GAN | GAN | 1 | 1 |
| GANO | Georgia Northern Railway Company | 4 | 2 |
| GAPAC | GAPAC | 1 | 0 |
| GAPX | Georgia Gulf Corporation-Plaquemine Division | 1 | 17 |
| GARR | GARR | 1 | 1 |
| GARX | General American Marks Company | 0 | 7 |
| GASC | Georgia, Ashburn, Sylvester & Camilla Ry | 1 | 0 |
| GASX | Gerdau Ameristeel | 6 | 1 |
| GATC | GATC | 0 | 1 |
| GATU | Gateway Container Leasing | 0 | 293 |
| GATX | General American Marks Company | 97 | 8135 |
| GAUR | GAUR | 0 | 1 |
| GAXX | Gerdau Ameristeel US, Inc | 1 | 7 |
| GBL | GBL | 4 | 3 |
| GBP | GBP | 1 | 0 |
| GBRF | GBRF | 22 | 0 |
| GBRR | GBRR | 0 | 1 |
| GBRX | Greenbrier Leasing Corporation | 1 | 578 |
| GBRY | Gettysburg Railway. | 2 | 0 |
| GBTX | GBTX Leasing | 0 | 4 |
| GBW | Green Bay & Western | 34 | 56 |
| GC | Georgia Central | 44 | 17 |
| GC1 | Graham County | 1 | 0 |
| GCCU | GE Capitol Container Finance Corp. | 0 | 2 |
| GCCX | General American Marks Company | 0 | 864 |
| GCEU | Genstar Container Corporation | 0 | 4 |
| GCEX | GCEX | 2 | 0 |
| GCEZ | Genstar Container Corporation | 0 | 6 |
| GCFX | Alstom Canada | 113 | 2 |
| GCK | GCK | 2 | 0 |
| GCLX | Gold Coast Limited | 3 | 0 |
| GCNU | Grimaldi | 0 | 14 |
| GCOX | Gold Coast Railroad Museum | 5 | 0 |
| GCPX | Georgia Gulf Corporation PVC Division | 0 | 2 |
| GCR | GCR | 4 | 0 |
| GCRC | Golden Cat Railroad Corp, The | 1 | 0 |
| GCRR | GCRR | 3 | 0 |
| GCRT | GCRT | 4 | 0 |
| GCRX | Grand Canyon Railway Incorporated | 16 | 19 |
| GCRY | Grand Canyon Railway | 19 | 19 |
| GCS | GCS | 1 | 0 |
| GCSJ | GCSJ | 4 | 0 |
| GCSR | Gulf Colorado and San Saba Railway | 5 | 0 |
| GCSS | GCSS | 2 | 0 |
| GCSX | Granite City Steel Co | 7 | 4 |
| GCT | GCT | 0 | 1 |
| GCTX | General Chemical Corporation | 0 | 13 |
| GCW | Garden City Western Railway Company | 6 | 0 |
| GDE | GDE | 1 | 5 |
| GDJX | Grimmel Industries | 0 | 7 |
| GE | GE | 12 | 0 |
| GEAX | General Electric Rail Services | 0 | 1024 |
| GECX | General Electric Company | 118 | 5 |
| GEDX | GEDX | 0 | 1 |
| GEGX | GE Gas Turbine | 0 | 3 |
| GEMX | General Electric Rail Services | 0 | 234 |
| GENX | General Electric Rail Services | 2 | 0 |
| GEO | GEO | 1 | 0 |
| GEORGIA | GEORGIA | 1 | 0 |
| GERC | GERC | 2 | 0 |
| GERDAU | GERDAU | 2 | 0 |
| GERX | Gershaw Recycling Company | 0 | 3 |
| GESU | GE-SeaCo | 0 | 323 |
| GETX | General American Marks Company | 1 | 18 |
| GETY | Gettysburg Railroad | 10 | 18 |
| GEX | General Electric Company | 1 | 5 |
| GEXR | Goderich & Exeter | 19 | 2 |
| GF | Norfolk Southern Railway Company (Georgia & Florida) | 2 | 2 |
| GFCX | Glens Falls Lehigh Cement Company | 0 | 13 |
| GFD | GFD | 0 | 3 |
| GFLX | Greenfield Logistics LLC | 0 | 11 |
| GFRR | Georgia and Florida Railnet | 25 | 61 |
| GFSX | General American Marks Company | 0 | 194 |
| GFSZ | General Freight Services, Inc. | 0 | 15 |
| GG | GG | 2 | 0 |
| GGCX | Georgia Gulf Corporation-Plaquemine Div | 0 | 44 |
| GGMX | Golden Gate Railroad Museum Incorporated | 2 | 1 |
| GGPX | General American Marks Company | 0 | 595 |
| GGS | Georgia Great Southern Division South Carolina Central Railro | 1 | 0 |
| GH | GH | 2 | 0 |
| GHD | GHD | 0 | 1 |
| GIEX | General American Marks Company | 0 | 24 |
| GIGX | GIGX | 0 | 1 |
| GIHX | Cornerstone C and M Incorporated d/b/a Gifford Hill and Comp | 1 | 5 |
| GILX | Gilman Paper Company | 0 | 1 |
| GIMX | General American Marks Company | 0 | 219 |
| GITM | Golden Isle Terminal RR | 1 | 1 |
| GITU | Giezendanner Transport AG | 0 | 1 |
| GJ | GJ | 0 | 1 |
| GJDU | GJDU | 0 | 1 |
| GKI | GKI | 2 | 0 |
| GKIX | GKIX | 1 | 0 |
| GKLX | Gold Kist | 4 | 2 |
| GKWR | GKWR | 0 | 1 |
| GL | Georgetown Loop | 10 | 1 |
| GLC | Great Lakes Central Railroad | 10 | 9 |
| GLCX | Great Lakes Carbon Corporation | 3 | 65 |
| GLDU | Gold Container Corporation | 0 | 251 |
| GLFX | GLFX | 0 | 14 |
| GLIX | GLIX | 0 | 1 |
| GLKK | GLKK | 0 | 1 |
| GLKX | Great Lakes Chemical Corporation | 0 | 5 |
| GLLX | Great Lakes Locomotive | 6 | 0 |
| GLNX | GLNX Corporation | 0 | 258 |
| GLOU | Chastniy Predrinimatel | 0 | 1 |
| GLR | GLR | 0 | 1 |
| GLRR | GLRR | 3 | 2 |
| GLRX | Georgetown Loop Railroad Incorporated | 1 | 1 |
| GLS | GLS | 0 | 1 |
| GLSR | Gloster Southern Railroad Corporation | 3 | 1 |
| GLSZ | GLSZ | 0 | 10 |
| GLVX | Marion Plywood Corp | 0 | 10 |
| GLW | GLW | 3 | 0 |
| GLX | GLX | 0 | 1 |
| GLXX | GLXX | 0 | 1 |
| GM | Gainesville Midland | 17 | 5 |
| GMAR | GMAR | 2 | 0 |
| GMC | GMC | 1 | 0 |
| GMDX | General Motors | 6 | 0 |
| GMEX | GMEX | 4 | 1 |
| GMIX | Chicago Freight Car Leasing Company | 0 | 2 |
| GMN | GMN | 0 | 1 |
| GMO | Gulf Mobile & Ohio | 128 | 83 |
| GMR | Georgia Midland | 4 | 0 |
| GMRC | Green Mountain RR | 13 | 447 |
| GMRS | GMRS | 1 | 0 |
| GMRX | GMRX | 0 | 1 |
| GMRY | Great Miami | 8 | 13 |
| GMSR | Kansas City Southern | 5 | 26 |
| GMT | GMT | 1 | 0 |
| GMTX | GATX Rail Locomotive Group | 162 | 5 |
| GN | Great Northern | 154 | 358 |
| GNA | Graysonia Nashville & Ashdown | 2 | 1 |
| GNAX | Holcim (US) Inc | 2 | 150 |
| GNAY | GNAY | 1 | 0 |
| GNBC | Grainbelt Corporation | 27 | 27 |
| GNER | GNER | 3 | 3 |
| GNFX | City of Gainesville Florida | 0 | 89 |
| GNLX | Georgia Industrial Leasing Company | 0 | 1 |
| GNRR | Georgia Northeastern | 18 | 154 |
| GNRX | GNRX | 0 | 1 |
| GNT | GNT | 0 | 1 |
| GNTX | TTX Company | 0 | 280 |
| GNW | GNW | 0 | 3 |
| GNWB | GNWB | 0 | 1 |
| GNWH | GNWH | 0 | 1 |
| GNWR | Genesee and Wyoming Railroad Company | 17 | 501 |
| GNZ | Great Northern | 0 | 1 |
| GO | Gulf and Ohio | 46 | 1 |
| GOAA | GOAA | 1 | 0 |
| GOCX | Chevron Phillips Chemical Company | 0 | 70 |
| GOHX | General American Marks Company | 0 | 74 |
| GOKX | GOKX | 0 | 1 |
| GOLD | GOLD | 0 | 1 |
| GOLDEN | GOLDEN | 1 | 0 |
| GONX | Railgon Company | 0 | 269 |
| GORK | GORK | 0 | 4 |
| GORR | GORR | 0 | 1 |
| GOT | GO Transit | 103 | 295 |
| GP | Georgia Pacific | 5 | 0 |
| GP-10 | GP-10 | 1 | 0 |
| GP35 | GP35 | 1 | 0 |
| GP40PH- | GP40PH- | 1 | 0 |
| GPA | GPA | 1 | 0 |
| GPBX | Georgia-Pacific Corporation | 0 | 1 |
| GPCO | Georgia Power Co | 2 | 0 |
| GPEX | General American Pfaudler | 0 | 4 |
| GPFX | General American Marks Company | 0 | 418 |
| GPIX | Cemex Inc | 0 | 4 |
| GPLX | General American Marks Company | 1 | 409 |
| GPMX | Georgia-Pacific Corporation- Mid Continent Wood Products Mfg | 0 | 12 |
| GPOX | GPOX | 0 | 1 |
| GPPX | Georgia-Pacific Corporation | 0 | 35 |
| GPSX | Georgia-Pacific Corporation Eastern Wood Products Mfg.Divisi | 0 | 60 |
| GPTZ | GPTZ | 0 | 1 |
| GPUX | GPU Service Corporation | 0 | 1 |
| GPWX | Georgia-Pacific Corp | 0 | 18 |
| GPX | GPX | 1 | 0 |
| GR | Grand Rapids Eastern Railroad Incorporated | 2 | 4 |
| GRAX | Graymont (pa) Inc. | 0 | 2 |
| GRCX | Granite Rock Company | 0 | 3 |
| GRCY | GRCY | 0 | 1 |
| GRDA | GRDA | 0 | 1 |
| GRDX | Grand River Dam Authority (Okla.) | 1 | 23 |
| GREX | Georgetown Rail Equipment Company | 3 | 140 |
| GRGW | GRGW | 0 | 1 |
| GRI | Grand Rapids & Indiana | 1 | 0 |
| GRIN | Great Plains Railway | 1 | 0 |
| GRIU | Grimaldi Group | 0 | 2 |
| GRIV | Gauley River Railroad LLC | 1 | 0 |
| GRLP | GRLP | 1 | 0 |
| GRLW | Greenville & Western Railway Company, LLC | 1 | 0 |
| GRMS | GRMS | 1 | 2 |
| GRMX | Gopher State Railway Museum | 1 | 0 |
| GRN | Greenville & Northern | 5 | 1 |
| GROX | First Union Rail | 0 | 54 |
| GRPX | CIT Group/Capital Finance, Inc | 1 | 56 |
| GRR | Georgetown Railroad Company | 21 | 37 |
| GRS | GRS | 5 | 0 |
| GRTX | Wheelabrator Coal Services Company | 0 | 6 |
| GRW | GRW | 0 | 3 |
| GRWR | Great Walton | 7 | 0 |
| GRYR | GRYR | 2 | 0 |
| GRYX | Transmatrix, Inc. | 0 | 4 |
| GS | Gloster Southern | 4 | 1 |
| GSC | GSC | 1 | 0 |
| GSCX | General American Marks Company | 29 | 5 |
| GSF | Georgia Southern and Florida Railway Company | 0 | 1 |
| GSIX | Semgroup, LP | 0 | 2 |
| GSLU | GSLU | 0 | 1 |
| GSLX | Silcott Railway Equipment Ltd | 3 | 0 |
| GSM | Great Smokey Mountains Railway | 1 | 1 |
| GSMR | Great Smoky Mountains | 9 | 47 |
| GSNX | Helm Financial Corporation | 0 | 94 |
| GSPU | Interpool Ltd. | 0 | 1 |
| GSRM | Georgia State Railroad Museum | 1 | 0 |
| GSRR | GSRR | 1 | 0 |
| GSRX | Golden Spike Railroad Services | 1 | 0 |
| GSS | GSS | 1 | 0 |
| GSSM | GSSM | 1 | 0 |
| GSSX | Gopher State Scrap and Metal | 2 | 20 |
| GST | GST | 1 | 0 |
| GSTU | Genstar Container Corporation | 0 | 160 |
| GSTX | Georgia Power Company | 0 | 96 |
| GSW | Great Southwest Railroad | 1 | 0 |
| GSWR | Georgia Southwestern | 39 | 8 |
| GSXT | GSXT | 0 | 1 |
| GT | Grand Trunk Railway | 12 | 25 |
| GTAS | GTAS | 0 | 1 |
| GTAX | Harvest States Cooperative | 0 | 1 |
| GTC | GTC | 1 | 0 |
| GTDR | GTDR | 2 | 3 |
| GTDT | Grand Traverse Dinner Train | 2 | 0 |
| GTIZ | G. T. Intermodal U.S.A. | 0 | 4 |
| GTLR | GTLR | 0 | 2 |
| GTLX | Great Lakes Rail Car Repair Service Inc. | 2 | 0 |
| GTMX | GTMX | 1 | 0 |
| GTP | Grand Trunk Pacific | 0 | 1 |
| GTR | Great River Railroad; d/b/a Rosedale-Bolivar County Port Comm | 2 | 0 |
| GTRA | Golden Triangle Railroad | 3 | 63 |
| GTRZ | GTRZ | 0 | 1 |
| GTSZ | GTSZ | 0 | 1 |
| GTTX | TTX Company | 0 | 2 |
| GTW | Grand Trunk Western | 472 | 1343 |
| GU | Grafton and Upton Railroad Company | 5 | 0 |
| GUEX | General American Marks Company | 0 | 1 |
| GURZ | Grafton and Upton Railroad Company | 0 | 1 |
| GV | GV | 1 | 0 |
| GVB | GVB | 1 | 0 |
| GVCU | Grand View Development (HK) Ltd. | 0 | 100 |
| GVDU | Grand View Development (HK) Ltd. | 0 | 35 |
| GVDX | Oxy Vinyls LP | 0 | 20 |
| GVLX | GVLX | 0 | 1 |
| GVNW | GVNW | 0 | 2 |
| GVRR | GVRR | 2 | 0 |
| GVRS | GVRS | 0 | 1 |
| GVRX | Grapevine Vintage Railroad | 4 | 2 |
| GVSR | Galveston Railroad L.P. | 9 | 491 |
| GVT | GVT | 2 | 1 |
| GW | GW | 4 | 3 |
| GWAX | Railroad Salvage and Restoration Incorporated | 0 | 1 |
| GWDT | GWDT | 1 | 0 |
| GWF | GWF | 0 | 1 |
| GWIN | GWIN | 1 | 0 |
| GWIX | GWI Leasing Corporation | 0 | 26 |
| GWMW | GWMW | 0 | 2 |
| GWR | Great Western Railway Company | 26 | 6 |
| GWRC | Georgia Woodlands | 3 | 0 |
| GWRR | Great Walton Railroad | 10 | 0 |
| GWRX | GWRX | 7 | 1 |
| GWWD | Greater Winnipeg Water District | 4 | 9 |
| GWWE | Gateway Eastern Railway Company | 1 | 0 |
| GWWP | GWWP | 0 | 1 |
| GWWR | Gateway Western | 44 | 60 |
| GXWR | GXWR | 0 | 1 |
| HA | HA | 1 | 0 |
| HABCO | HABCO | 1 | 0 |
| HABX | Habco International Incorporated | 2 | 9 |
| HAD | HAD | 0 | 1 |
| HAJNOWKA | HAJNOWKA | 6 | 0 |
| HALX | Holland American Line - Westours Incorporated | 0 | 12 |
| HAMU | Costa Line | 0 | 4 |
| HAMX | Hams Beer | 0 | 1 |
| HANNA | HANNA | 1 | 0 |
| HANSON | HANSON | 2 | 0 |
| HANZ | HANZ | 0 | 3 |
| HAPX | Helm-Atlantic Leasing LLP | 0 | 1 |
| HARM | HARM | 0 | 2 |
| HART | HART | 1 | 1 |
| HARX | General Electric Rail Services | 0 | 4 |
| HASX | HASX | 2 | 0 |
| HATX | Helm Financial Corporation | 91 | 23 |
| HAWA | HAWA | 0 | 1 |
| HAWS | HAWS | 1 | 0 |
| HAWX | Glenn O Hawbaker, Inc | 1 | 0 |
| HAYSI | HAYSI | 1 | 0 |
| HB | Hampton and Branchville | 15 | 4 |
| HBI | HBI | 1 | 0 |
| HBIU | HBIU | 0 | 1 |
| HBL | Harbor Belt Line | 1 | 0 |
| HBM | HBM | 1 | 0 |
| HBR | HBR | 7 | 0 |
| HBRY | Hudson Bay Railway Company | 20 | 0 |
| HBT | Houston Belt & Terminal | 11 | 0 |
| HBTM | HBTM | 1 | 0 |
| HBWX | Georgia Power Company | 1 | 32 |
| HBZ | HBZ | 0 | 1 |
| HC | HC | 10 | 0 |
| HCBX | Chevron Phillips Chemical Company | 0 | 67 |
| HCCX | Southeastern Industrial Enterprises, Inc | 0 | 16 |
| HCGX | North American Salt Company | 0 | 38 |
| HCLC | HCLC | 1 | 0 |
| HCLU | Hapag-Lloyd | 0 | 1 |
| HCLX | Basell Canada Incorporated | 21 | 1 |
| HCMU | HCMU | 0 | 1 |
| HCMX | Harnischfeger CCorporation | 0 | 1 |
| HCPX | Occidental Chemical Corporation | 0 | 3 |
| HCR | HCR | 1 | 1 |
| HCRC | HCRC | 7 | 3 |
| HCRY | Huron Central Railway | 13 | 1 |
| HCS | HCS | 1 | 0 |
| HCSX | Helm Chesapeake LLP | 0 | 142 |
| HCTX | Martin Marietta Corporation | 3 | 2 |
| HCX | HCX | 0 | 2 |
| HCYR | Horry County | 2 | 0 |
| HD | HD | 2 | 0 |
| HDC | HDC | 1 | 0 |
| HDCX | HDCX | 0 | 1 |
| HDMU | Hyundai Merchant Marine (America) Incorporated | 0 | 1411 |
| HDMZ | Hyundai Merchant Marine (America) Incorporated | 0 | 2 |
| HDRM | Heart of Dixie Railway Museum | 3 | 0 |
| HDRR | HDRR | 1 | 0 |
| HDSX | CIT Group/Capital Finance, Inc | 0 | 7 |
| HDTX | Huish Detergents, Inc | 0 | 6 |
| HE | Hollis and Eastern Railroad Company | 4 | 24 |
| HEAG | HEAG | 1 | 0 |
| HEAVY | HEAVY | 1 | 0 |
| HEAX | American Railcar Industries | 0 | 1 |
| HEC | HEC | 1 | 0 |
| HELX | Helm Financial Corporation | 0 | 11 |
| HEMPT | HEMPT | 1 | 0 |
| HEPX | Ontario Hydro | 0 | 1 |
| HEQX | Helm Financial Corporation | 0 | 23 |
| HERCULES | HERCULES | 1 | 0 |
| HERITAGE | HERITAGE | 1 | 0 |
| HERS | HERS | 1 | 0 |
| HERZ | HERZ | 0 | 4 |
| HESR | Huron and Eastern | 26 | 80 |
| HESX | Heritage Environmental Services | 0 | 4 |
| HEX | HEX | 1 | 0 |
| HFC | HFC | 1 | 0 |
| HFD | HFD | 0 | 1 |
| HFE | HFE | 0 | 4 |
| HFPX | HFPX | 0 | 4 |
| HFT | HFT | 0 | 1 |
| HGIO | HGIO | 0 | 1 |
| HGIU | Hub Group, Inc. | 0 | 1266 |
| HGLU | HGLU | 0 | 1 |
| HGPX | Harrison Gypsum Company | 0 | 2 |
| HGTU | Hoyer | 0 | 2 |
| HGZX | HGZX | 1 | 6 |
| HHCX | Huntsman, LLC | 0 | 6 |
| HHLC | HHLC | 3 | 0 |
| HI | HI | 10 | 0 |
| HIAW | HIAW | 0 | 3 |
| HICK | HICK | 0 | 1 |
| HIGH | HIGH | 0 | 1 |
| HILX | HILX | 1 | 0 |
| HIPX | NRG Energy | 0 | 181 |
| HIRR | Hainesport Industrial Railroad | 0 | 8 |
| HIRX | HIRX | 0 | 8 |
| HIT | HIT | 1 | 1 |
| HIU | HIU | 0 | 1 |
| HJCU | HANJIN Container Lines Limited | 0 | 1203 |
| HJCZ | HANJIN Container Lines Limited | 0 | 3 |
| HJPX | HJPX | 0 | 2 |
| HJVX | Helm Financial Corporation | 0 | 31 |
| HK | HK | 1 | 0 |
| HKCX | HKCX | 1 | 0 |
| HKGX | Haines & Kibblehouse Inc. | 3 | 49 |
| HL | HL | 4 | 0 |
| HLB | HLB | 0 | 2 |
| HLBZ | Hill Brothers Transportation | 0 | 1 |
| HLC | HLC | 2 | 3 |
| HLCE | HLCE | 1 | 0 |
| HLCK | HLCK | 1 | 0 |
| HLCSX | HLCSX | 1 | 0 |
| HLCU | Hapag-Lloyd A G | 0 | 27 |
| HLCX | Helm Financial | 788 | 0 |
| HLGX | Helm Financial | 41 | 0 |
| HLJX | HLJX | 0 | 1 |
| HLLX | Helm Locomotive Leasing | 2 | 0 |
| HLMX | Helm Financial Corporation | 5 | 1000 |
| HLPX | Otter Tail Power Company | 0 | 91 |
| HLRX | HLRX | 0 | 1 |
| HLSC | Hampton Railway Incorporated | 1 | 142 |
| HLTX | BP Solvay Polyethylene North America | 0 | 70 |
| HLXU | Hapag Lloyd Container Line | 0 | 548 |
| HMAX | Huntsman Corporation | 0 | 10 |
| HMBX | HMBX | 0 | 8 |
| HMCR | Huntsville and Madison County Railroad Authority | 2 | 0 |
| HMCU | Hatsu Marine (Evergreen Line) | 0 | 10 |
| HMCX | HoltraChem Manufacturing Company LLC | 1 | 2 |
| HMFX | Florida Rock Industries Incorporated | 3 | 0 |
| HMIX | Henkels and McCoy Inc | 0 | 2 |
| HMJK | HMJK | 0 | 1 |
| HMJX | HELM Financial Corporation | 0 | 98 |
| HMMU | Hyundai Merchant Marine Co. Ltd. | 0 | 6 |
| HMTX | HMTX | 0 | 1 |
| HMWX | Heckett Multiserv | 2 | 0 |
| HMX | HMX | 0 | 1 |
| HN | Hutchinson and Northern Railway Company | 4 | 2 |
| HNSN | HNSN | 3 | 0 |
| HOBO | HOBO | 2 | 1 |
| HOCX | HOCX | 0 | 2 |
| HODX | Heart of Dixie Railway Museum | 7 | 5 |
| HOG | Heart of Georgia | 8 | 2 |
| HOKX | Occidental Chemical Corporation | 1 | 417 |
| HOLC | HOLC | 0 | 4 |
| HOLL | HOLL | 0 | 2 |
| HOLN | HOLN | 0 | 1 |
| HOLX | HOLX | 0 | 3 |
| HOMC | HOMC | 1 | 0 |
| HOMESTAKE | HOMESTAKE | 3 | 0 |
| HOMU | Hyundai | 0 | 3 |
| HOMX | CIT Group/Capital Finance, Inc. | 0 | 16 |
| HONU | HONU | 0 | 1 |
| HOS | Hoosier Southern Railroad | 3 | 3 |
| HOTU | Hoyer-Odfjell BV | 0 | 12 |
| HOXL | HOXL | 0 | 1 |
| HPAX | International Paper Company | 0 | 9 |
| HPC | HPC | 1 | 0 |
| HPCX | Hercules Powder Co., Inc. | 2 | 3 |
| HPFX | HPFX | 0 | 1 |
| HPHU | HPHU | 0 | 1 |
| HPIX | Basell USA, Inc | 0 | 60 |
| HPJK | HPJK | 0 | 1 |
| HPJX | Helm-Pacific Leasing | 0 | 449 |
| HPKX | HPKX | 0 | 1 |
| HPLLC | HPLLC | 1 | 0 |
| HPLX | Exxon Mobil Corporation | 0 | 68 |
| HPPX | Huntsman Polypropylene Corporation | 0 | 21 |
| HPRX | HPRX | 1 | 0 |
| HPTD | High Point Thomasville and Denton Railroad | 1 | 2 |
| HQ | HQ | 1 | 0 |
| HR | HR | 1 | 0 |
| HRCU | Cuba Iron S.A. | 0 | 1 |
| HRCX | Heritage Railcar | 1 | 0 |
| HRCY | HRCY | 1 | 0 |
| HRD | HRD | 0 | 1 |
| HRIX | HRIX | 1 | 1 |
| HRM | HRM | 1 | 0 |
| HRR | Huckleberry Railroad | 9 | 10 |
| HRRC | Housatonic Railroad Company | 8 | 3 |
| HRS | Holidaysburg and Roaring Spring Railroad Company | 1 | 4 |
| HRSX | Harbor Rail Services of California Incorporated | 0 | 2 |
| HRT | Hartwell RR | 18 | 3 |
| HRZ | HRZ | 0 | 1 |
| HRZU | Horizon Lines LLC | 0 | 30 |
| HS | H and S Railroad Company | 5 | 1218 |
| HSCX | Steel Wheels Limited | 0 | 1 |
| HSE | HSE | 0 | 1 |
| HSIU | HSIU | 0 | 1 |
| HSJ | HSJ | 1 | 0 |
| HSM | HSM | 1 | 0 |
| HSMR | HSMR | 1 | 1 |
| HSRR | Hardin Southern Railroad Incorporated | 1 | 0 |
| HSSRY | HSSRY | 1 | 0 |
| HT | HT | 1 | 0 |
| HTB | HTB | 14 | 0 |
| HTCX | General Electric Rail Services | 0 | 1 |
| HTD | HTD | 0 | 1 |
| HTL | HTL | 1 | 0 |
| HTR | HTR | 1 | 0 |
| HTSX | Ge Railcar Services Inc. | 2 | 0 |
| HTT | Harsco Track Technologies | 1 | 4 |
| HTTX | TTX Company | 0 | 360 |
| HTW | Hoosac Tunnel and Wilmington | 0 | 1 |
| HTX | HTX | 0 | 1 |
| HUBU | Hub Group | 0 | 937 |
| HULC | HULC | 0 | 14 |
| HUMU | HUMU | 0 | 2 |
| HUNU | HUB Group Inc. | 0 | 236 |
| HUTX | Hutchinson Transportation Company | 0 | 23 |
| HV | HV | 5 | 6 |
| HVR | HVR | 1 | 3 |
| HVRM | HVRM | 2 | 0 |
| HVRR | Hocking Valley | 2 | 6 |
| HVRX | Heber Valley Historic Railroad | 5 | 16 |
| HVS | HVS | 1 | 3 |
| HVSR | Hocking Valley Scenic | 2 | 0 |
| HW | HW | 1 | 0 |
| HWB | HWB | 1 | 0 |
| HWCR | HWCR | 0 | 1 |
| HWCX | Halliburton Company | 0 | 26 |
| HWPX | Hiram Walker and Sons Incorporated | 0 | 2 |
| HYWX | Georgia Power Company | 0 | 65 |
| HZCX | HZCX | 0 | 1 |
| HZGX | Herzog Contracting Corporation | 18 | 776 |
| HZGZ | HZGZ | 0 | 3 |
| IAIA | IAIA | 1 | 0 |
| IAIS | Iowa Interstate | 103 | 261 |
| IAN | IAN | 0 | 1 |
| IANR | Iowa Northern Ry | 32 | 54 |
| IANW | Iowa Northwestern | 2 | 0 |
| IAPX | Air Liquide America Corporation | 0 | 16 |
| IARR | Iowa River RR | 1 | 0 |
| IATR | Iowa Traction Railroad Company | 6 | 169 |
| IBCX | Indiana Box Car Corporation | 35 | 2 |
| IBOX | TTX Company | 0 | 1 |
| IBPX | Trinity Industries Leasing Company | 0 | 76 |
| IBT | International Bridge and Terminal Company | 0 | 408 |
| IC | Illinois Central | 864 | 1509 |
| ICCX | International Catalyst Corp. | 0 | 17 |
| ICE | Iowa Chicago and Eastern | 123 | 1030 |
| ICEZ | GATX Capital Corporation | 0 | 112 |
| ICG | Illinois Central Gulf | 458 | 818 |
| ICGX | ICGX | 0 | 1 |
| ICGZ | Illinois Central Railroad Company | 0 | 2 |
| ICLU | International Cont. Leasing | 0 | 1 |
| ICLX | Intercoastal Leasing Incorporated | 0 | 1 |
| ICMX | Cargill Dry Corn Ingredients | 0 | 40 |
| ICPX | Icl Performance Products Lp | 0 | 5 |
| ICRK | Indian Creek Railroad Company | 1 | 0 |
| ICRR | ICRR | 2 | 0 |
| ICRX | Island Creek Corporation | 0 | 3 |
| ICRZ | Illinois Central Railroad Company | 0 | 1 |
| ICSU | Transamerica Leasing Incorporated | 0 | 24 |
| ICX | ICX | 0 | 6 |
| ICXX | ICXX | 0 | 101 |
| ICZ | Illinois Central | 0 | 1 |
| IDC | IDC | 0 | 4 |
| IDCZ | Interstate Distributor Co | 0 | 39 |
| IDEA | IDEA | 1 | 0 |
| IDEAL | IDEAL | 1 | 0 |
| IDTU | Hawaii Intermodal Tank Transport | 0 | 1 |
| IEAU | Intermodal Equipment Associates | 0 | 2 |
| IEIB | IEIB | 1 | 0 |
| IELP | IELP | 1 | 0 |
| IESX | Alliant Energy | 1 | 73 |
| IFBX | General Electric Rail Services | 0 | 21 |
| IFRX | Infinity Rail LLC | 0 | 203 |
| IGC | IGC | 0 | 1 |
| IGMX | Integrated Grain & Milling | 1 | 0 |
| IHB | Indiana Harbor Belt | 169 | 613 |
| IHCR | IHCR | 4 | 0 |
| IHIR | Indian Hill & Iron Range | 2 | 0 |
| IHP | IHP | 0 | 1 |
| IHR | IHR | 0 | 1 |
| IHRC | Indiana Hi Rail | 5 | 2 |
| IIC | International Intermodal Center | 2 | 0 |
| IIRR | IIRR | 1 | 0 |
| ILDX | General Electric Company - Lighting Business Group | 0 | 3 |
| ILLINOIS | ILLINOIS | 1 | 0 |
| ILR | ILR | 1 | 0 |
| ILRV | ILRV | 2 | 4 |
| ILRY | ILRY | 2 | 0 |
| ILS | ILS | 2 | 0 |
| ILSX | Independent Locomotive Service | 71 | 2 |
| ILTU | International Liquid Transport Company Bv | 0 | 1 |
| ILTX | ILTX | 0 | 1 |
| IM | IM | 4 | 0 |
| IMC | IMC | 2 | 0 |
| IMCU | Industrial Maritime Carriers Inc. | 0 | 2 |
| IMCX | Mosaic Company | 11 | 181 |
| IMDU | Seateq Inc. | 0 | 2 |
| IMFX | General American Transportation Corp. | 0 | 1 |
| IMM | IMM | 1 | 0 |
| IMP | Industrial Metals Processing | 1 | 0 |
| IMRL | I&M Rail Link | 103 | 164 |
| IMRR | Illinois Midland Railroad | 12 | 12 |
| IMS | IMS | 1 | 0 |
| IMTU | Italia Marittima (Evergreen Line) | 0 | 32 |
| IMTX | Ag Processing Incorporated | 0 | 2 |
| IN | Indiana Northeastern | 11 | 0 |
| IN1 | Illinois Northern | 5 | 1 |
| INBU | Interpool Ltd. | 0 | 176 |
| INCO | INCO | 2 | 0 |
| INCR | INCR | 1 | 0 |
| IND | IND | 1 | 0 |
| INEX | INEOS Styrenics | 0 | 65 |
| INFX | Infineum USA Incorporated | 0 | 33 |
| INGU | Trifleet Leasing | 0 | 1 |
| INGX | General Electric Rail Services | 0 | 1 |
| INKU | Interpool Limited | 0 | 153 |
| INLAND | INLAND | 5 | 0 |
| INLX | Incoal Company | 15 | 294 |
| INNU | Interpool Ltd. | 0 | 2 |
| INOU | Interocean | 0 | 1 |
| INP | INP | 0 | 1 |
| INPR | Idaho Northern and Pacific Railroad | 17 | 14 |
| INPX | Inland Pacific Railroad | 0 | 1 |
| INRD | Indiana Railroad | 75 | 62 |
| INSX | Independent Salt Company | 0 | 9 |
| INT | Norfolk Southern Railway Company | 1 | 0 |
| INTU | Interpool Container Pty Limited | 0 | 2 |
| INTX | Interstate Commodities Inc. | 0 | 99 |
| INVX | Invista S A R L | 0 | 89 |
| IOCR | Indiana and Ohio Central Railroad | 0 | 22 |
| IONX | IONX | 0 | 1 |
| IORP | Turtle Creek & Lebanon | 1 | 3 |
| IORY | Indiana & Ohio | 69 | 6 |
| IP | IP | 1 | 0 |
| IPBX | Innophos, Inc | 0 | 48 |
| IPCX | International Paper Company | 0 | 21 |
| IPLX | Illinois Power Company | 1 | 0 |
| IPOX | A and R Leasing, LLP | 0 | 1 |
| IPPX | Intermountain Power Agency (Utah) | 2 | 24 |
| IPSX | General American Marks Company | 0 | 48 |
| IPWX | Allient Energy | 0 | 2 |
| IPXU | Interpool, Inc. | 0 | 32 |
| IQIX | Industria Quimica Del letmo S.A. de C.V. | 0 | 1 |
| IR | Illinois Railnet | 36 | 2 |
| IRA | IRA | 3 | 0 |
| IRCX | Indian Refining Company | 0 | 1 |
| IREX | IRECO Incorporated | 3 | 8 |
| IRLX | Western Railroad Supply | 8 | 0 |
| IRM | IRM | 1 | 0 |
| IRMZ | III Transportation | 0 | 1 |
| IRN | Ironton RR | 1 | 0 |
| IRNU | Interpool, Inc. | 0 | 6 |
| IRONTON | IRONTON | 1 | 0 |
| IRR | IRR | 3 | 0 |
| IRRC | Iowa R.R. Co. | 3 | 1 |
| IRSI | IRSI | 14 | 2 |
| IRT | IRT | 2 | 1 |
| IRTX | IRTX | 4 | 0 |
| IRYM | IRYM | 2 | 7 |
| IS | IS | 2 | 5 |
| ISCU | I.S.C. Chemicals Ltd | 0 | 1 |
| ISCX | ISC Incorporated | 5 | 43 |
| ISG | International Steel Group | 1 | 0 |
| ISGX | International Steel Group | 2 | 250 |
| ISLX | ISLX | 1 | 1 |
| ISPX | International Specialty Products | 0 | 1 |
| ISRARAIL | ISRARAIL | 1 | 0 |
| ISRC | ISRC | 0 | 1 |
| ISRR | Indiana Southern | 20 | 1 |
| ISS | ISS | 1 | 0 |
| ISSL | ISSL | 1 | 0 |
| ISSN | ISSN | 0 | 1 |
| IT | IT | 1 | 0 |
| ITAU | Italian Lines | 0 | 28 |
| ITAX | Illinois Transit Assembly Incorporated | 1 | 2 |
| ITC | Illinois Terminal Railroad | 35 | 99 |
| ITCX | International Technologies Corporation | 0 | 1 |
| ITDX | SULCOM Incorporated | 0 | 72 |
| ITGX | Andersons - Railgroup | 0 | 72 |
| ITI | Unknown | 1 | 1 |
| ITLU | Itel Containers International Corporation | 0 | 5 |
| ITLX | General Electric Rail Services | 1 | 403 |
| ITLZ | ITLZ | 0 | 1 |
| ITMX | ITMX | 0 | 1 |
| ITMZ | ITMZ | 1 | 2 |
| ITPX | ITPX | 0 | 1 |
| ITR | ITR | 2 | 0 |
| ITSR | ITSR | 1 | 0 |
| ITSX | ITSX | 2 | 2 |
| ITT | ITT | 1 | 0 |
| ITTX | TTX Company | 0 | 570 |
| ITTZ | ITTZ | 0 | 1 |
| ITW | ITW | 0 | 2 |
| ITXX | Tiaxcalteca de Industrias S.A. de C.V. | 0 | 6 |
| IU | Indianapolis Union | 1 | 0 |
| IVB | IVB | 5 | 0 |
| IVCX | IVCX | 0 | 1 |
| IVLU | Ivarans Rederei A/S | 0 | 14 |
| IW | Illinois Western | 1 | 0 |
| IWSX | IWSX | 0 | 1 |
| J | J | 3 | 0 |
| JACK | JACK | 0 | 2 |
| JACX | Johnstown America Corporation | 0 | 1 |
| JAIX | JAIX Leasing Corporation | 0 | 37 |
| JAMALCO | JAMALCO | 6 | 0 |
| JAXPORT | JAXPORT | 4 | 0 |
| JB | JB | 1 | 0 |
| JBHU | J. B. Hunt Transport Incorporated | 0 | 4788 |
| JBHZ | J. B. Hunt Transport Incorporated | 0 | 61 |
| JBJH | JBJH | 0 | 1 |
| JBKU | JBKU | 0 | 3 |
| JBPX | PacifiCorp Electric Operations and Idaho Power Company - Jim | 0 | 3 |
| JBRX | Bakery Trading Company | 0 | 43 |
| JBWX | JBWX | 0 | 1 |
| JC | JC | 1 | 0 |
| JCAC | JCAC | 2 | 0 |
| JCI | JCI | 1 | 0 |
| JCIX | Jones Chemicals, Inc. | 0 | 1 |
| JCMC | JCMC | 1 | 0 |
| JCMX | Junction City Mining | 1 | 0 |
| JD | JD | 2 | 1 |
| JDHX | JD Heiskell | 4 | 0 |
| JDNX | J & M Locomotive Inc. | 6 | 0 |
| JDSX | M and C Railcar Leasing LLC | 0 | 8 |
| JE | Joppa and Eastern Railroad Company | 0 | 137 |
| JECX | Jeffrey Energy Center | 0 | 253 |
| JEFF | JEFF | 0 | 1 |
| JEFFERSON | JEFFERSON | 1 | 0 |
| JEFW | Jefferson Warrior Railroad Company | 5 | 8 |
| JEPX | Duke Energy Indiana, Inc | 0 | 36 |
| JES | JES | 0 | 4 |
| JESX | James E Strates Shows | 0 | 45 |
| JETX | Jefferson Transportation LLC | 0 | 4 |
| JEWELL | JEWELL | 1 | 0 |
| JFJ | JFJ | 2 | 1 |
| JH | JH | 1 | 0 |
| JHBAXTER | JHBAXTER | 1 | 0 |
| JHCU | Hammelmann Transport GmbH | 0 | 1 |
| JHCX | JHCX | 1 | 0 |
| JHMX | Alabama Power Company | 0 | 43 |
| JITONG | JITONG | 5 | 0 |
| JJCX | JJCX | 0 | 1 |
| JJJX | Legend Marketing Limited | 0 | 7 |
| JJRD | J and J Railroad Incorporated | 0 | 1 |
| JJRR | JJRR | 0 | 2 |
| JKCZ | JKCZ | 0 | 3 |
| JKWI | JKWI | 3 | 0 |
| JL | JL | 1 | 1 |
| JLCX | JLCX | 18 | 0 |
| JLGX | JLGX | 1 | 0 |
| JMC | JMC | 1 | 0 |
| JMCO | JMCO | 1 | 0 |
| JMHX | J. M. Huber | 3 | 199 |
| JNHU | JNHU | 0 | 3 |
| JNR | JNR | 84 | 1 |
| JNSX | JNS Marketing Company Coastline Rail Service Division | 0 | 1 |
| JOBX | Tealinc Limited | 0 | 9 |
| JOGX | Jointa Galusha Llc | 0 | 19 |
| JOHN | JOHN | 0 | 1 |
| JOPI | JOPI | 1 | 0 |
| JOSX | Rail Connection, Inc | 0 | 119 |
| JOY | JOY | 2 | 0 |
| JPBX | Joint Powers Board (CalTrain) | 30 | 9 |
| JPMX | JPMX | 0 | 3 |
| JPRC | JPRC | 1 | 0 |
| JPRR | JPRR | 1 | 0 |
| JPTX | JPTX | 1 | 0 |
| JR | JR | 2 | 0 |
| JRF | JRF | 33 | 9 |
| JRS | JRS | 1 | 0 |
| JRSX | J.R. Simplot Company | 2 | 175 |
| JRSZ | J & R Schugel Trucking Inc | 0 | 13 |
| JRWX | Johnson Rail Services | 13 | 0 |
| JS | JS | 1 | 0 |
| JSCX | Consumers Energy | 0 | 305 |
| JSE | Janesville & Southeastern | 3 | 0 |
| JSRC | Jackson and Southern Railroad Company | 1 | 0 |
| JSVU | JSV | 0 | 1 |
| JT | JT | 2 | 0 |
| JT42 | JT42 | 1 | 0 |
| JTC | JTC | 8 | 2 |
| JTCX | JTCX | 4 | 2 |
| JTFS | JTFS | 6 | 5 |
| JTIX | David J Joseph Company | 0 | 68 |
| JTIZ | JTIZ | 0 | 2 |
| JTJX | TTX Company | 0 | 2 |
| JTLX | CIT Group/Capital Finance, Inc | 0 | 148 |
| JTMX | Headwaters Resources Incorporated | 0 | 16 |
| JTPX | Joseph Transportation | 38 | 0 |
| JTSX | Joseph Transportation Incorporated | 0 | 242 |
| JTTX | TTX Company | 0 | 167 |
| JUNIATA | JUNIATA | 1 | 0 |
| JVCZ | JVCZ | 0 | 4 |
| JVRR | Juniata Valley Railroad Company | 1 | 0 |
| JW | JW | 1 | 0 |
| JWAX | General Electric Rail Services | 0 | 1 |
| JWGX | JWGX | 1 | 0 |
| JWR | JWR | 1 | 0 |
| JWRX | Alabama Power Company | 3 | 15 |
| JX | JX | 0 | 1 |
| JXPT | JXPT | 3 | 0 |
| JZGX | JZGX | 0 | 1 |
| K | K | 3 | 0 |
| KA | KA | 1 | 0 |
| KAIX | Rinker Materials Corporation | 1 | 0 |
| KAMX | Kamen Incorporated | 0 | 1 |
| KASG | KASG | 0 | 1 |
| KATY | KATY | 0 | 1 |
| KAUILA | KAUILA | 1 | 0 |
| KB | KB | 2 | 0 |
| KBEC | KBEC | 1 | 0 |
| KBLX | Canam Minerals Inc | 0 | 2 |
| KBR | KBR | 0 | 6 |
| KBS | KBS | 3 | 0 |
| KBSR | Kankakee Beaverville and Southern Railroad Company | 17 | 98 |
| KBSZ | Kankakee Beaverville and Southern Railroad | 0 | 2 |
| KC | KC | 2 | 0 |
| KCBX | KCBX | 1 | 0 |
| KCC | KCC | 8 | 3 |
| KCCS | Kansas City Clinton & Springfield | 0 | 1 |
| KCCX | Kennecott Utah Copper Corporation | 11 | 108 |
| KCDX | Eastman Kodak Company | 3 | 0 |
| KCEX | Kazco Enterprises | 1 | 0 |
| KCGX | Cemex Inc | 0 | 4 |
| KCLX | Kansas City Power and Light Company | 0 | 56 |
| KCMETRO | KCMETRO | 3 | 0 |
| KCMS | KCMS | 2 | 0 |
| KCNW | KCNW | 1 | 0 |
| KCPL | KCPL | 1 | 0 |
| KCPS | KCPS | 1 | 0 |
| KCPX | Kemira Chemicals Canada Incorporated | 0 | 12 |
| KCR | KCR | 17 | 0 |
| KCRBS | KCRBS | 1 | 0 |
| KCRR | KCRR | 1 | 0 |
| KCS | Kansas City Southern | 1138 | 2588 |
| KCSC | KCSC | 0 | 4 |
| KCSE | KCSE | 0 | 1 |
| KCSM | Kansas City Southern De Mexico | 304 | 43 |
| KCSR | KCSR | 0 | 1 |
| KCSU | Kansas City Southern Railway Company | 0 | 1 |
| KCSZ | Kansas City Southern Railway Company | 0 | 3 |
| KCT | Kansas City Terminal | 9 | 0 |
| KDCX | Eastman Chemical Canada Incorporated | 0 | 3 |
| KDHX | KDHX | 0 | 1 |
| KDTX | Tomco Railway Car Co., Inc. | 0 | 1 |
| KEBX | Ronald L. Boothman Remainder Trust | 0 | 1 |
| KEIKYU | KEIKYU | 3 | 0 |
| KELX | Kellogg Company | 0 | 53 |
| KERR | KERR | 1 | 0 |
| KERSHAW | KERSHAW | 1 | 0 |
| KEWH | Kewash RR | 1 | 0 |
| KEYX | Keywell Corporation | 0 | 120 |
| KFIX | J & J Railcar Leasing | 0 | 2 |
| KFR | Kettle Falls International Rwy | 3 | 0 |
| KFTX | J & J Railcar Leasing | 0 | 20 |
| KGBW | Kewaunee Green Bay and Western | 5 | 0 |
| KGCX | INDSPEC Chemical Corporation | 0 | 8 |
| KGFX | Kingsford Company | 0 | 17 |
| KGLX | Commonwealth Edison Company | 0 | 130 |
| KHJU | Kien Hung | 0 | 5 |
| KHLU | Kien Hung | 0 | 11 |
| KHLZ | KHLZ | 0 | 1 |
| KHR | KHR | 1 | 1 |
| KIAMICHI | KIAMICHI | 1 | 0 |
| KIIX | Koppers Industries Incorporated | 0 | 16 |
| KIMX | Kimmins Contracting Corp | 0 | 4 |
| KIT | KIT | 4 | 0 |
| KITC | KITC | 0 | 1 |
| KITRR | KITRR | 3 | 0 |
| KJR | Berkman Rail Services Incorporated (d.b.a Kiski Junction Rail | 2 | 2 |
| KJRY | Keokuk Junction | 7 | 10 |
| KKFU | Kawasaki Kisen Kaisha Ltd. | 0 | 1435 |
| KKLU | K Line | 0 | 1 |
| KKLZ | K Line | 0 | 11 |
| KKRR | Knox and Kane Railroad Company | 14 | 40 |
| KKRX | KKRX | 2 | 0 |
| KKTU | Kerr Steamship 'K' Line | 0 | 180 |
| KL | KL | 1 | 1 |
| KLCU | IBJ Leasing Company Limited | 0 | 1 |
| KLEX | Kayway Industries Inc. | 0 | 1 |
| KLFU | Kawasaki Kisen Kaisha Ltd. | 0 | 237 |
| KLLX | Trinity Industries Inc. | 0 | 9 |
| KLMZ | KLMZ | 0 | 3 |
| KLSC | Kalamazoo Lake Shore and Chicago Railway | 1 | 1 |
| KLTU | Kawasaki Kisen Kaisha Ltd. | 0 | 69 |
| KLWX | KLWX | 17 | 0 |
| KLXU | Hans Klaeser Luxemburg GmbH | 0 | 1 |
| KM | Kansas and Missouri Railway and Terminal Company | 10 | 0 |
| KMC | KMC | 3 | 2 |
| KMFR | KMFR | 0 | 1 |
| KMFZ | KMFZ | 0 | 2 |
| KMKX | KMKX | 0 | 2 |
| KMNX | KMNX | 0 | 5 |
| KMRY | KMRY | 0 | 1 |
| KMSU | Yang Ming Line | 0 | 1 |
| KMTX | KMTX | 2 | 0 |
| KMUX | Kershaw Manufacturing Company | 0 | 4 |
| KNCX | Koch Nitrogen Company | 0 | 22 |
| KNLU | Nedlloyd Lines | 0 | 27 |
| KNOR | Klamath Northern Ry. Co. | 1 | 0 |
| KNOX | Philip Metals, Inc | 1 | 12 |
| KNRY | Korean National Railways | 12 | 0 |
| KNTZ | KNTZ | 0 | 2 |
| KO | Kansas & Oklahoma | 10 | 34 |
| KOAX | KOAX | 0 | 1 |
| KOCH | KOCH | 1 | 0 |
| KOG | Kansas Oklahoma & Gulf | 0 | 1 |
| KOKOSING | KOKOSING | 1 | 0 |
| KOLPREM | KOLPREM | 2 | 0 |
| KOMA | KOMA | 0 | 1 |
| KOPPEL | KOPPEL | 1 | 0 |
| KOPPERS | KOPPERS | 2 | 0 |
| KORA | KORA | 0 | 1 |
| KORAIL | KORAIL | 6 | 0 |
| KORR | KORR | 1 | 0 |
| KPC | KPC | 0 | 1 |
| KPCX | Koppers Industries Incorporated | 2 | 2 |
| KPCZ | K and P Cartage Company | 0 | 5 |
| KPE | KPE | 0 | 1 |
| KPLC | KPLC | 1 | 0 |
| KPLX | Western Resources Incorporated (Kans.) | 2 | 12 |
| KPPU | K Line Power Pak | 0 | 6 |
| KPRY | KPRY | 2 | 4 |
| KPXX | Andersons - Railgroup | 0 | 4 |
| KR | KR | 0 | 1 |
| KRC | KRC | 38 | 0 |
| KRCX | R.M. Johnson Company, Inc. | 0 | 1 |
| KREX | KREX | 0 | 1 |
| KRJY | KRJY | 1 | 0 |
| KRL | Kasgro Rail Lines | 0 | 224 |
| KRLX | KRLX | 0 | 1 |
| KRM | Kentucky Railway Museum | 5 | 3 |
| KRPD | KRPD | 2 | 0 |
| KRR | Kiamichi | 24 | 13 |
| KRS | KRS | 1 | 0 |
| KRT | Kanawah River Terminals | 12 | 0 |
| KRUPP | KRUPP | 1 | 0 |
| KS | KS | 2 | 1 |
| KSC | KSC | 1 | 1 |
| KSCL | KSCL | 1 | 0 |
| KSCM | KSCM | 1 | 0 |
| KSCX | KSCX | 0 | 6 |
| KSRY | Kosciusko & Southwestern Railway | 3 | 11 |
| KSUU | Kansas City Southern Railway Co. | 0 | 2 |
| KSW | Kansas Southwestern Railway | 5 | 1 |
| KT | Kentucky and Tennessee Railway Company | 3 | 8 |
| KTI | KTI | 0 | 3 |
| KTIZ | KTIZ | 0 | 2 |
| KTS | Kenosha Trolley | 2 | 3 |
| KTTX | TTX Company | 0 | 14 |
| KTX | ACF Industries Incorporated | 3 | 0 |
| KUCX | Kentucky Utilities Company | 3 | 0 |
| KURX | KURX | 2 | 0 |
| KW | Keota & Washington RR | 1 | 0 |
| KWT | KWT Railway | 6 | 20 |
| KWUX | Siemens Power Corporation | 0 | 13 |
| KXHR | Knoxville & Holston River RR | 15 | 8 |
| KYLE | Kyle Railroad | 45 | 178 |
| LA | Lousiana and Arkansas | 2 | 3 |
| LACK | LACK | 0 | 2 |
| LACMTA | LACMTA | 7 | 0 |
| LACTMA | LACTMA | 2 | 0 |
| LADY | LADY | 3 | 0 |
| LAFARGE | LAFARGE | 1 | 0 |
| LAFX | LaFarge | 4 | 124 |
| LAHX | Transportation Equipment Incorporated | 0 | 3 |
| LAJ | Los Angeles Junction Railway | 9 | 1 |
| LAKE | LAKE | 0 | 1 |
| LAKX | City of Lakeland (Fla.) | 0 | 198 |
| LAL | Livonia Avon & Lakeville | 18 | 8 |
| LAMB | LAMB | 0 | 1 |
| LAMCO | LAMCO | 2 | 0 |
| LAMTA | LAMTA | 1 | 0 |
| LANC | LANC | 0 | 1 |
| LANDMARK | LANDMARK | 1 | 0 |
| LANO | Penn Eastern Rail Lines Incorporated | 0 | 1 |
| LANX | Lansing Grain Company, LLC | 0 | 35 |
| LANZ | Lance Inc. | 0 | 20 |
| LAONANORTH | LAONANORTH | 1 | 0 |
| LAPX | Linde Air Products Co. | 0 | 4 |
| LASB | LASB | 1 | 1 |
| LASCO | LASCO | 1 | 0 |
| LATR | LATR | 0 | 1 |
| LBC | LBC | 1 | 0 |
| LBFX | L B Foster Co | 0 | 2 |
| LBHZ | LBHZ | 0 | 1 |
| LBR | Lowville and Beaver River Railroad Compa | 3 | 148 |
| LC | Lancaster & Chester | 14 | 30 |
| LCEX | Lone Star Industries Incorporated | 0 | 236 |
| LCGX | Cargill Incorporated C.G.D. Division | 0 | 131 |
| LCIX | Praxair Incorporated | 0 | 32 |
| LCL | LCL | 2 | 0 |
| LCLX | Ledcor Communications Limited | 0 | 4 |
| LCM | Lake Champlain & Moriah | 1 | 2 |
| LCPX | General American Marks Company | 0 | 1 |
| LCR | Lake County Railroad | 1 | 0 |
| LCRA | LCRA | 0 | 1 |
| LCRC | LCRC | 2 | 0 |
| LCRR | LCRR | 3 | 0 |
| LCRX | Lower Colorado River Authority (Texas) | 0 | 63 |
| LCS | LCS | 2 | 1 |
| LCSR | LCSR | 1 | 0 |
| LCTR | LCTR | 2 | 1 |
| LCTX | LCTX | 0 | 1 |
| LCW | LCW | 1 | 0 |
| LDC | LDC | 1 | 0 |
| LDCX | Louis Dreyfus Corporation | 5 | 5 |
| LDRR | Louisiana and Delta Railroad Incorporated | 17 | 1 |
| LDS | LDS | 1 | 0 |
| LDSX | Lambton Diesel Specialists Incorporated | 5 | 0 |
| LE | LE | 1 | 1 |
| LECX | LECX | 0 | 2 |
| LEF | Lake Erie Franklin and Clarion Railroad Company | 0 | 3 |
| LEFC | Lake Erie, Franklin & Claron | 8 | 2 |
| LEHI | LEHI | 0 | 1 |
| LEHIGH | LEHIGH | 1 | 0 |
| LEHX | Lehigh Cement Company | 2 | 118 |
| LEN | Lake Erie and Northern Railway Company | 1 | 1 |
| LEOX | Golden Foods Incorporated | 0 | 11 |
| LER | Logansport and Eel River Short-Line Company Incorporated | 1 | 0 |
| LERL | LERL | 1 | 0 |
| LEROYLIME | LEROYLIME | 1 | 0 |
| LERX | PSI Energy Incorporated | 0 | 2 |
| LERY | LERY | 1 | 0 |
| LETU | LETU | 0 | 1 |
| LETX | WATCO Incorporated | 2 | 0 |
| LEV | LEV | 1 | 0 |
| LEVIATHAN | LEVIATHAN | 2 | 0 |
| LEVX | Level Energy Incorporated | 0 | 1 |
| LF | LF | 0 | 2 |
| LFCD | Linea Coahuila Durango S.A. de C.V. | 9 | 5 |
| LFG | LFG | 1 | 0 |
| LFP | Langdale Forest Products | 0 | 2 |
| LFPX | Lane Forest Products Inc | 0 | 3 |
| LG | LG | 1 | 0 |
| LGE | LGE | 5 | 0 |
| LGEX | L.G. Everist Incorporated | 0 | 36 |
| LGHN | LGHN | 1 | 0 |
| LGOM | LGOM | 0 | 1 |
| LGSR | LGSR | 1 | 1 |
| LH | LH | 0 | 1 |
| LHFX | Lehigh Heavy Forge Corporation | 0 | 6 |
| LHHN | LHHN | 1 | 0 |
| LHR | Lehigh & Hudson River | 6 | 4 |
| LHRR | Longhorn Railroad | 1 | 1 |
| LHVX | LHVX | 0 | 1 |
| LI | Long Island Rail Road Company | 413 | 124 |
| LIMA | LIMA | 1 | 0 |
| LIMX | LIMX | 1 | 5 |
| LINC | Lewis and Clark Railway Company | 0 | 1 |
| LIRC | Louisville & Indiana | 19 | 5 |
| LIRR | Long Island Railroad | 132 | 87 |
| LIRX | Lapeer Industrial Railway | 2 | 0 |
| LISX | Maine Metal Recycling Inc. | 0 | 4 |
| LISZ | LISZ | 0 | 2 |
| LIT | LIT | 2 | 0 |
| LITCO | LITCO | 1 | 0 |
| LITT | LITT | 0 | 1 |
| LITTLE | LITTLE | 2 | 0 |
| LITU | Liral Trading International | 0 | 2 |
| LIVE | LIVE | 0 | 2 |
| LIZ | Liz Cement Company (Soicon group) | 0 | 3 |
| LKP | LKP | 0 | 1 |
| LKPA | LKPA | 0 | 1 |
| LKPR | LKPR | 2 | 2 |
| LKRR | Little Kanawha River Rail Incorporated | 1 | 0 |
| LKVY | LKVY | 1 | 0 |
| LL | Lionel Lines | 1 | 1 |
| LLC | LLC | 1 | 0 |
| LLECHWEED | LLECHWEED | 1 | 0 |
| LLIX | Services Unlimited | 0 | 11 |
| LLNX | Western Fruit Express Co. | 0 | 1 |
| LLPC | LLPC | 1 | 0 |
| LLPX | Locomotive Leasing Partners | 245 | 0 |
| LLRX | LLRX | 1 | 0 |
| LLW | Lavacot Locomotive Works | 3 | 0 |
| LLX | Luria Brothers | 2 | 0 |
| LLZ | LLZ | 0 | 1 |
| LM | Litchfield & Madison | 0 | 3 |
| LMC | LMC | 3 | 0 |
| LMIC | Lake Michigan & Indiana Railroad | 7 | 126 |
| LMIX | Loram Maintenance of Way Inc. | 26 | 53 |
| LMLI | LMLI | 0 | 3 |
| LMLX | Livingston Mountain Locomotive Works | 1 | 0 |
| LMLZ | LMLZ | 0 | 6 |
| LMM | LMM | 1 | 0 |
| LMS | LMS | 22 | 0 |
| LMSX | Locomotive Management Services | 37 | 0 |
| LMW | LMW | 1 | 0 |
| LMX | LMX | 92 | 0 |
| LN | Louisville & Nashville | 494 | 447 |
| LNAC | Chattahoochee Bay Railroad, LLC | 7 | 37 |
| LNAL | Louisville New Albany and Corydon Railroad | 2 | 2 |
| LNE | Lehigh and New England Ry | 3 | 13 |
| LNER | London North Eastern Railway | 4 | 0 |
| LNTX | Alliant Energy | 0 | 44 |
| LNW | Louisiana & Northwestern | 15 | 7 |
| LNZZ | Louisville & Nashville | 0 | 2 |
| LO | LO | 1 | 0 |
| LOAM | Lousiana Midland | 3 | 6 |
| LOCX | Mobile Locomotive Services. Inc | 10 | 1 |
| LOGI | LOGI | 0 | 1 |
| LOGX | Linden Leasing Incorporated | 0 | 2 |
| LONDON | LONDON | 1 | 0 |
| LOR | LOR | 0 | 1 |
| LORA | LORA | 0 | 22 |
| LORAM | LORAM | 6 | 0 |
| LORE | LORE | 0 | 1 |
| LOS | Lancaster Oxford & Southern | 1 | 1 |
| LOSX | Locomotive Specialists, Inc. | 21 | 0 |
| LOTOS | LOTOS | 40 | 0 |
| LOVX | American Colloid Company | 0 | 2 |
| LP | LP | 0 | 1 |
| LPN | Longview, Portland & Northern | 2 | 5 |
| LPS | LPS | 5 | 0 |
| LPX | LPX | 1 | 0 |
| LR | LR | 1 | 0 |
| LRC | LRC | 0 | 1 |
| LRCX | Livingston Rebuild Center | 40 | 0 |
| LRG | LRG | 0 | 2 |
| LRGX | LRGX | 0 | 1 |
| LRIX | Lake Superior Eastern Rail Industries | 0 | 1 |
| LRMX | Logistics Resource Management | 2 | 0 |
| LRR | Little River Railroad | 5 | 6 |
| LRRE | LRRE | 0 | 1 |
| LRS | Laurinburg and Southern | 32 | 15 |
| LRSX | LRSX | 9 | 0 |
| LRV | LRV | 0 | 1 |
| LRVC | LRVC | 1 | 0 |
| LRWN | Little Rock & Western | 5 | 111 |
| LRWY | Lackawanna Railway Incorporated | 2 | 0 |
| LS | Luzerne And Susquehanna | 5 | 1 |
| LSBC | LSBC | 10 | 2 |
| LSCO | Lehigh Stone | 3 | 0 |
| LSCX | D-H Investors (Relam Auditing Services) | 1 | 0 |
| LSE | LSE | 2 | 0 |
| LSEU | One Way Lease Incorporated | 0 | 9 |
| LSFZ | Burlington Northern and Santa Fe Railway Company | 0 | 23 |
| LSGX | Lone Star Gas | 0 | 1 |
| LSI | Lake Superior and Ishpeming Railroad | 50 | 716 |
| LSIX | ADM Transportation | 1 | 4 |
| LSJT | LSJT | 1 | 0 |
| LSLX | Lone Star Locomotive Leasing Llc | 4 | 0 |
| LSM | LSM | 2 | 0 |
| LSMR | LSMR | 1 | 5 |
| LSMRR | LSMRR | 1 | 0 |
| LSMS | LSMS | 3 | 2 |
| LSMT | LSMT | 2 | 1 |
| LSMX | Andersons - Railgroup | 0 | 4 |
| LSOX | LSOX | 1 | 0 |
| LSR | LSR | 0 | 1 |
| LSRC | Lake State Railway Company | 33 | 100 |
| LSRH | LSRH | 0 | 2 |
| LSRHS | LSRHS | 3 | 0 |
| LSRM | LSRM | 0 | 1 |
| LSRX | Lake Superior Railroad Museum | 3 | 5 |
| LSSX | Lone Star Steel | 3 | 0 |
| LSTT | Lake Superior Terminal Transfer | 6 | 1 |
| LSTX | LSTX | 0 | 4 |
| LSWR | LSWR | 1 | 0 |
| LT | Lake Terminal Railroad Company | 2 | 107 |
| LTCX | Praxair Incorporated | 0 | 22 |
| LTEX | Larry's Truck Electric | 231 | 0 |
| LTIU | Lloyd Triestine Di Navigazione S.P.A. | 0 | 73 |
| LTMZ | LTMZ | 1 | 0 |
| LTRY | LTRY | 0 | 1 |
| LTS | LTS | 1 | 0 |
| LTTX | TTX Company | 0 | 11 |
| LTV | LTV | 15 | 0 |
| LTVX | LTV Steel Company | 2 | 0 |
| LUBIANA | LUBIANA | 1 | 0 |
| LUCX | Services Unlimited | 0 | 5 |
| LUK | LUK | 2 | 0 |
| LUKENS | LUKENS | 1 | 0 |
| LUMBER | LUMBER | 2 | 0 |
| LUN | Ludington and Northern Railway | 1 | 0 |
| LUNX | General Electric Rail Services | 0 | 3 |
| LUPX | Lanxess Corporation | 0 | 14 |
| LV | Lehigh Valley | 99 | 45 |
| LVAL | Lackawanna Valley Railroad Corporation | 2 | 1 |
| LVR | LVR | 1 | 0 |
| LVRB | LVRB | 12 | 0 |
| LVRC | Lamoille Valley | 4 | 34 |
| LVRF | LVRF | 1 | 0 |
| LVRR | Lycoming Valley | 9 | 34 |
| LVRX | LVRX | 0 | 2 |
| LVT | LVT | 6 | 0 |
| LW | Louisville and Wadley Railway Company | 1 | 567 |
| LWT | LWT | 0 | 160 |
| LWV | LWV | 1 | 0 |
| LWVX | Lake Shore Railway Association Inc. | 0 | 2 |
| LXCH | LXCH | 0 | 3 |
| LXOH | Knoxville & Holston River Railroad | 2 | 37 |
| LXVR | Luxapalia Valley | 2 | 0 |
| LY | LY | 1 | 0 |
| LYNX | Round Butte Products | 0 | 1 |
| LYTU | Hapag Lloyd Container Line | 0 | 3 |
| LZ | LZ | 0 | 1 |
| LZRX | LZRX | 2 | 0 |
| M-19 | M-19 | 0 | 1 |
| M-4 | M-4 | 1 | 0 |
| M41 | M41 | 1 | 0 |
| MA | MA | 1 | 0 |
| MAA | Magma Arizona Railroad Company | 3 | 0 |
| MAC | MAC | 3 | 0 |
| MACK | MACK | 1 | 0 |
| MACOSA | MACOSA | 1 | 0 |
| MACS | MACS | 2 | 0 |
| MACX | Mac Acquisitions. L.P. | 0 | 15 |
| MAEC | MAEC | 0 | 2 |
| MAEG | Maersk Sealand | 0 | 17 |
| MAEU | Maersk Line | 0 | 142 |
| MAFERSA | MAFERSA | 1 | 0 |
| MAG | MAG | 1 | 0 |
| MAGU | MAGU | 0 | 3 |
| MAGX | Midwest Agri Commodities Company | 1 | 91 |
| MAIN | MAIN | 0 | 2 |
| MALK | MALK | 1 | 0 |
| MALX | Mid-America Locomotive and Car Repair Incor |
