| - | - | 3 | 8 |
| -CAB | -CAB | 0 | 1 |
| 14E | 14E | 1 | 0 |
| 2 | 2 | 1 | 0 |
| 256 | 256 | 0 | 1 |
| 59 | 59 | 1 | 0 |
| 6 | 6 | 1 | 0 |
| 6E1 | 6E1 | 1 | 0 |
| A | A | 0 | 1 |
| AA | Ann Arbor | 31 | 16 |
| AAIX | Acs International Inc | 0 | 3 |
| AAMX | ACFA Arrendadora de Carros de Ferrocarril S.A. | 0 | 9 |
| AAPX | AAPX | 0 | 1 |
| AAR | Association of American Railroads | 1 | 6 |
| AARX | AARX | 11 | 4 |
| AAX | AGRICO CHEMICAL | 1 | 0 |
| AB | Akron and Barberton Cluster Railway Company | 3 | 0 |
| ABB | Akron and Barberton Belt Railroad Company | 1 | 0 |
| ABC | Atlanta Birmingham & Coast | 3 | 1 |
| ABCX | Alabama Byproducts Corporation | 3 | 0 |
| ABEX | Advanced BioEnergy | 2 | 0 |
| ABFZ | Arkansas Best Freight | 0 | 128 |
| ABITIBI | ABITIBI | 2 | 0 |
| ABL | Alameda Belt Line | 2 | 0 |
| ABOX | TTX Company | 0 | 207 |
| ABP | Aberdeen & Briar Patch | 1 | 0 |
| ABS | Alabama Southern Railroad | 0 | 1 |
| AC | Algoma Central | 31 | 50 |
| ACAD | ACAD | 0 | 1 |
| ACAX | Honeywell International Incorporated | 1 | 0 |
| ACBX | American Cast Iron Pipe Company | 4 | 0 |
| ACCU | Aboitiz Shipping Corp | 0 | 3 |
| ACCX | Consolidation Coal Company | 1 | 27 |
| ACDX | Honeywell International Incorporated | 0 | 1 |
| ACE | ACE | 1 | 0 |
| ACEX | Ace Cogeneration Company (Calif.) | 6 | 13 |
| ACFX | General Electric Rail Services | 0 | 2787 |
| ACHD | Atlantic City Harley Davidson | 1 | 0 |
| ACL | Atlantic Coast Line | 23 | 56 |
| ACLU | Atlantic Container Line Limited | 0 | 26 |
| ACLZ | Atlantic Container Line Ab | 0 | 4 |
| Acme | Acme Steel | 3 | 0 |
| ACP | ACP | 14 | 2 |
| ACPX | Union Tank Car Company | 0 | 7 |
| ACPZ | American Concrete Products Company | 0 | 1 |
| ACR | ACR | 1 | 1 |
| ACRC | Andalusia & Conecuh | 1 | 0 |
| ACRX | Elementis Chromium LP | 0 | 12 |
| ACSX | Honeywell International Incorporated | 0 | 1 |
| ACTX | Honeywell International Incorporated | 1 | 16 |
| ACW | ACW | 1 | 0 |
| ACWR | Aberdeen, Carolina & Western | 30 | 11 |
| ACY | Akron, Canton & Youngstown | 1 | 8 |
| ACZX | Norfolk Southern Railway Company | 0 | 1 |
| AD | Asbestos & Danville | 1 | 1 |
| ADBF | Adrian and Blissfield Rail Road Company | 10 | 9 |
| ADCX | Adolph Coors | 4 | 4 |
| ADFX | ADFX | 2 | 0 |
| ADIR | ADIR | 1 | 0 |
| ADIX | Adirondack Railway Preservation Society | 13 | 6 |
| ADMX | ADM Transportation Company | 36 | 2596 |
| ADN | Ashley Drew & Northern | 6 | 51 |
| ADVENZA | ADVENZA | 1 | 0 |
| AEC | Atlantic and East Carolina Railway Compa | 0 | 1 |
| AECX | Associated Electric Cooperative Incorporated (Mo.) | 0 | 77 |
| AEE | AEE | 0 | 3 |
| AEFR | Aurora Elgin and Fox River Electric | 1 | 0 |
| AEIX | Alan Eslisk | 1 | 0 |
| AELZ | AELZ | 0 | 2 |
| AEOX | AEOX | 0 | 33 |
| AEPX | American Electric Power | 4 | 182 |
| AEQX | ATEL Equipment Corporation | 0 | 33 |
| AERC | Albany and Eastern Railroad Company | 6 | 224 |
| AERX | American Energy Resources Generating Com | 0 | 142 |
| AERY | AERY | 1 | 0 |
| AESX | General Electric Rail Services | 0 | 11 |
| AEX | Andersons | 0 | 1287 |
| AF | Alabama and Florida Railway Company | 2 | 2 |
| AFCX | ATEL Capital Equipment Fund 7, L.P. | 0 | 41 |
| AFFU | AFFU | 0 | 1 |
| AFIU | ABS Industrial Verification Incorporated | 0 | 5 |
| AFLR | Alabama & Florida RR | 10 | 0 |
| AFPX | Honeywell International Incorporated | 0 | 27 |
| AFRX | AF Railway Industries Incorporated | 2 | 0 |
| AFSX | Astaris LLC | 0 | 8 |
| AFT | AFT | 2 | 0 |
| AGCR | Alamo Gulf Coast Railroad Company | 0 | 1 |
| AGCX | Procor Limited | 0 | 9 |
| AGHX | Agrium U.S. Incorporated | 0 | 2 |
| AGIX | AGRI Industries | 0 | 3 |
| AGLF | Knoxville & Holston River Railroad | 4 | 14 |
| AGLX | Andrews Petroleum Incorporated | 0 | 1 |
| AGMU | Agmark Foods Inc | 0 | 6 |
| AGMX | Terra Nitrogen Limited Partnership | 1 | 1 |
| AGP | AGP | 1 | 0 |
| AGPX | Ag Processing Incorporated | 12 | 319 |
| AGR | Alabama and Gulf Coast | 18 | 216 |
| AGRI | AGRI | 2 | 0 |
| AGVX | Ag Valley Co-op | 2 | 0 |
| AGX | AGX | 1 | 0 |
| AGYX | Centrex Construction Products Inc (American Gypsum Company) | 0 | 4 |
| AHCX | PCS Phosphate Company | 0 | 2 |
| AHMSA | AHMSA | 2 | 0 |
| AI | AI | 1 | 0 |
| AIGX | Aig Commercial Equipment Finance Inc | 0 | 1 |
| AIW | AIW | 0 | 1 |
| AIX | Aggregate Industries | 4 | 0 |
| AJPX | Searles Valley Minerals Operations, Inc. | 0 | 52 |
| AK | AK | 3 | 0 |
| AKDN | Acadiana Railway Company | 5 | 0 |
| AKLU | K Line | 0 | 7 |
| AKM | American Kraft Mills | 1 | 0 |
| AKMD | Arkansas Midland Railroad Company | 14 | 40 |
| AKS | AKS | 1 | 0 |
| AL | Almanor Railroad Company | 1 | 0 |
| ALAB | Alabama Railroad | 2 | 99 |
| ALAX | Equistar Chemicals, LP | 0 | 136 |
| ALBANY | ALBANY | 1 | 0 |
| ALC | ALC | 1 | 0 |
| ALCO | ALCO | 1 | 0 |
| ALEX | AGRI Industries | 0 | 1 |
| ALG | ALG | 2 | 0 |
| ALGILBERT | ALGILBERT | 1 | 0 |
| ALGOMA | ALGOMA | 1 | 0 |
| ALGX | Algoma Steel | 8 | 0 |
| ALHX | AllCapital Rail Management, LLC | 0 | 23 |
| ALKX | Airlake Terminal Railway Co. | 0 | 4 |
| ALL | America Latina Logistica | 18 | 3 |
| ALLX | AllCapital Rail Management, LLC | 0 | 7 |
| ALLZ | Alliance Shippers Incorporated | 0 | 422 |
| ALM | Arkansas Louisiana and Mississippi Railr | 8 | 196 |
| ALMER | ALMER | 1 | 0 |
| ALMX | Trinity Rail Management Incorporated | 0 | 5 |
| ALNX | Alberta Government | 0 | 28 |
| ALPART | ALPART | 1 | 0 |
| ALPU | ALPU | 0 | 1 |
| ALPX | Alberta Government | 0 | 82 |
| ALPZ | ALPZ | 0 | 1 |
| ALQS | Aliquippa and Southern Railroad Company | 1 | 0 |
| ALR | Alan Richie Incorporated | 2 | 0 |
| ALRR | ALRR | 3 | 0 |
| ALS | Alton &Southern Railway | 22 | 43 |
| 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 | 2 |
| ALY | Allegheny and Eastern Railroad Incorpora | 8 | 62 |
| AM | Arkansas & Missouri | 36 | 65 |
| AMBX | American Boiler Works Incorporated | 1 | 0 |
| AMC | Arkansas Louisiana and Mississippi Railr | 0 | 11 |
| AMCX | BP Amoco Chemical Company Chemical Division | 0 | 250 |
| AMDX | AMDX | 0 | 4 |
| AMER | AMER | 0 | 1 |
| AMERISTEEL | AMERISTEEL | 1 | 0 |
| AMEX | Allied Enterprises | 0 | 3 |
| AMFU | Amphibious Container Leasing Limited | 0 | 85 |
| AMFX | American Railcar Industries | 0 | 1 |
| AMG | AMG | 1 | 0 |
| AMGX | AMG Resources Corporation | 0 | 106 |
| AMHZ | American Highway Inc | 0 | 1 |
| AMIX | Railcar Leasing Specialists | 0 | 15 |
| AMKT | AMKT | 1 | 0 |
| AMLX | American Railcar Company | 2 | 0 |
| AMOX | Union Tank Car Company | 0 | 237 |
| AMPU | Alcan Aluminum Corporation | 0 | 1 |
| AMPX | General Electric Rail Services | 0 | 7 |
| AMR | Arcata & Mad River | 3 | 0 |
| AMTH | AMTH | 1 | 0 |
| AMTK | Amtrak | 1248 | 1573 |
| AMTR | AMTR | 0 | 1 |
| AMTRK | AMTRK | 10 | 0 |
| AMTX | TUCO Inc | 0 | 1 |
| AMTZ | Amtrak (National Railroad Passenger Corporation) | 0 | 18 |
| AMWX | AMWX | 4 | 0 |
| AMXX | AMXX | 0 | 1 |
| AMZU | Amphibious Container Leasing Ltd | 0 | 2 |
| AN | Apalachicola Northern | 10 | 38 |
| ANAX | General Electric Rail Services | 0 | 19 |
| ANBEL | ANBEL | 3 | 0 |
| ANBX | Anbel Corporation | 0 | 1 |
| ANCX | Norit Americas Incorporated | 0 | 1 |
| ANDX | Andesite Rock Company | 3 | 0 |
| ANGX | Andersons - Railgroup | 0 | 26 |
| ANKX | A and K Railroad Materials Incorporated | 0 | 3 |
| ANR | Angelina and Neches River Railroad | 1 | 40 |
| AO | Appalachian & Ohio | 20 | 2 |
| AOCX | Aluminum Company of America | 1 | 15 |
| AOE | American Orient Express | 0 | 33 |
| AOIX | Marathon Ashland Petroleum Company | 0 | 1 |
| AOK | Arkansas-Oklahoma Railroad | 11 | 1364 |
| APA | Apache Railway Company | 10 | 5 |
| APACHE | APACHE | 1 | 0 |
| APAX | Cimentos Apasco S.A. De C.V. | 0 | 9 |
| APCU | American President Lines Limited | 0 | 258 |
| APCX | Allied Lime Company | 0 | 3 |
| APD | Albany Port District | 2 | 0 |
| APEX | Apex Tank Car Line | 0 | 1 |
| APHG | APHG | 0 | 1 |
| APHU | APL Co. Pte. Ltd.- NOL Group | 0 | 375 |
| APHX | Air Products Polymers LP | 0 | 24 |
| APIX | Commonwealth Plan Incorporated | 0 | 4 |
| APLJ | American Presidential Lines | 0 | 14 |
| APLS | American President Lines, Ltd | 0 | 14 |
| APLU | American President Lines Limited | 0 | 533 |
| APLZ | American President Lines Limited | 0 | 15 |
| APM | APM | 1 | 0 |
| APMU | Maersk Lines | 0 | 28 |
| 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 | 11 |
| APPZ | APPZ | 0 | 1 |
| APR | APR | 2 | 0 |
| APRU | APL Logistics | 0 | 37 |
| APRX | Air Products and Chemicals Incorporated | 0 | 19 |
| APTX | Air Products and Chemicals Incorporated | 0 | 4 |
| APWX | Appalachian Power Company | 0 | 1 |
| APZU | APL Co. Pte. Ltd.- NOL Group | 0 | 201 |
| AR | Aberdeen and Rockfish | 7 | 20 |
| ARA | Arcade and Attica Railroad Corporation | 1 | 0 |
| ARC | Alexander Railroad | 5 | 0 |
| ARCO | ARCO | 1 | 0 |
| AREX | Aeropres Corporation | 0 | 28 |
| ARG | ARG | 0 | 1 |
| ARGO | ARGO | 0 | 1 |
| ARHS | ARHS | 2 | 0 |
| ARI | ARI | 1 | 1 |
| ARIX | General Electric Rail Services | 0 | 53 |
| ARLX | A & R Leasing LLC | 0 | 1 |
| ARM | ARM | 1 | 0 |
| ARMCO | ARMCO | 2 | 0 |
| ARMH | Union Pacific Railroad Company | 0 | 1 |
| ARMN | Union Pacific Railroad Company | 0 | 1759 |
| ARMY | ARMY | 1 | 1 |
| ARN | Alberta RailNet Incorporated | 10 | 0 |
| ARND | Arnaud Railway | 1 | 0 |
| ARPX | BP Products North America | 1 | 3 |
| ARR | Alaska Railroad | 68 | 29 |
| ARROW | ARROW | 1 | 0 |
| ARSX | Sunoco Inc. (R&M) | 0 | 80 |
| ARSZ | ARSZ | 0 | 1 |
| ART | American Refrigerator Transit Company | 0 | 3 |
| ARTX | Artrain | 0 | 9 |
| ARZC | Arizona and California Railroad | 16 | 3 |
| AS | AS | 6 | 2 |
| ASAB | Bay Line Railroad LLC | 15 | 47 |
| ASBESTOS | ASBESTOS | 1 | 0 |
| ASCX | ARMCO Steel Company | 8 | 0 |
| ASDX | Allied Services--A Division of Allied Equities Corp. | 0 | 1 |
| ASF | Inland Steel | 1 | 0 |
| ASFX | American Steel Foundries | 4 | 2 |
| ASGX | Ash Grove Cement Company | 0 | 13 |
| ASHX | Solvay Chemicals, Inc. | 0 | 168 |
| ASI | ASI | 0 | 1 |
| ASIU | Alliance Shippers Inc | 0 | 63 |
| ASLX | ASLX | 0 | 5 |
| ASLZ | ASLZ | 0 | 2 |
| ASML | Atlanta, Stone Mountain & Lithonia | 8 | 0 |
| ASP | ASP | 0 | 1 |
| ASPX | ASPX | 0 | 1 |
| ASRX | Domino Sugar Company | 0 | 2 |
| ASRY | Ashland Railway | 10 | 2 |
| ASS | ASS | 1 | 0 |
| ASTX | Asarco Incorporated | 0 | 6 |
| ASV | ASV | 1 | 1 |
| ASWC | ASWC | 1 | 0 |
| AT | Auto Train | 12 | 5 |
| AT0X | AT0X | 0 | 1 |
| ATAF | ATAF | 1 | 0 |
| ATAX | Arizona Transit Assembly | 0 | 7 |
| ATC | ATC | 1 | 0 |
| ATCX | Southern Illinois Railcar Incorporated | 2 | 1 |
| ATEX | Asplundh Tree Expert Co Railroad Division | 0 | 5 |
| ATGX | Atel Leasing Corporation | 13 | 126 |
| ATIX | Alstom Transportation | 2 | 2 |
| ATLAS | ATLAS | 2 | 0 |
| ATLS | ATLS | 1 | 0 |
| ATLT | Austin Todd and Ladd Railroad Company | 6 | 1 |
| ATN | Alabama & Tennessee River Railway Llc | 0 | 1 |
| ATS | ATS | 0 | 21 |
| ATSF | Atchison Topeka & Santa Fe | 1959 | 2073 |
| ATSFA | ATSFA | 1 | 0 |
| ATSI | ATSI | 0 | 1 |
| ATSZ | ATSZ | 0 | 4 |
| ATTX | TTX Company | 3 | 52 |
| ATW | Atlantic and Western | 5 | 1067 |
| AUAR | Austin Area Terminal Railway | 11 | 1 |
| AUBX | U.S. Plastic Lumber Ltd. | 0 | 1 |
| AUG | Augusta Railroad | 2 | 0 |
| AUNW | Austin & Northwestern | 2 | 0 |
| AVGX | Avon Grain | 1 | 0 |
| AVL | Aroostook Valley Railroad Company | 1 | 0 |
| AVLU | Allied Van Lines | 0 | 8 |
| AVR | Allegheny Valley | 5 | 0 |
| AVRT | AVRT | 0 | 5 |
| AVRZ | AVRZ | 0 | 3 |
| AW | AW | 1 | 2 |
| AWIU | AWIU | 0 | 161 |
| AWIX | Albright and Wilson Americas Incorporated | 0 | 1 |
| AWP | Atlanta & West Point | 6 | 7 |
| AWSU | Andrew Weir Shipping | 0 | 6 |
| AWVU | AWVU | 0 | 2 |
| AWW | Algiers Winslow and Western Railway | 6 | 0 |
| AWXX | East Carbon development Company | 0 | 95 |
| AX | AX | 0 | 1 |
| AXXZ | Agricultural Express of America | 0 | 146 |
| AZ | AZ | 0 | 1 |
| AZCR | Arizona Central Railroad | 6 | 0 |
| AZCX | Azcon Corporation | 2 | 1 |
| AZER | Arizona Eastern Railway Company | 12 | 3 |
| AZEX | Arizona Electric Power Cooperative Incorporated | 0 | 7 |
| AZG | AZG | 1 | 0 |
| AZLU | Hapag Lloyd Container Line | 0 | 1 |
| AZPX | AZPX | 0 | 4 |
| AZRC | AZRC | 2 | 0 |
| AZXX | Arizona Chemical Company | 0 | 21 |
| B | B | 1 | 0 |
| B0 | B0 | 1 | 0 |
| BA | Baltimore & Annapolis | 4 | 2 |
| BAEX | Andersons | 0 | 106 |
| BAFU | Bulkhaul Ltd. | 0 | 2 |
| BAKER | BAKER | 1 | 0 |
| BALX | Bayer Corporation | 0 | 9 |
| BAP | Butte Anaconda & Pacific | 2 | 0 |
| BAR | Bangor & Aroostook | 73 | 149 |
| BART | BART | 1 | 0 |
| BARTLETT | BARTLETT | 1 | 0 |
| BARU | Barons Leasing Corporation | 0 | 1 |
| BARX | BARX | 1 | 0 |
| BARZ | Bangor and Aroostook Railroad Company | 0 | 1 |
| BAT | BAT | 0 | 1 |
| BAWX | Babcox & Wilcox | 0 | 4 |
| BAYL | Bay Line, LLC | 20 | 12 |
| BAYU | Mobay Chemical Corporation | 0 | 3 |
| BAYX | Bayer Corporation | 0 | 3 |
| BB | Buckingham Branch | 13 | 28 |
| BBCX | ABB Power Generation Incorporated | 0 | 2 |
| BBGX | Greenbrier Management Services, LLC | 0 | 11 |
| 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 | 3 | 6 |
| BCAX | Blue Circle Incorporated | 0 | 21 |
| BCC | BCC | 1 | 0 |
| BCEN | BCEN | 3 | 2 |
| BCER | BCER | 1 | 0 |
| BCG | BCG | 1 | 0 |
| BCGL | BCGL | 0 | 1 |
| BCH | Southern Railway of British Columbia Limited | 2 | 1 |
| BCIT | Canadian National Railways | 0 | 38 |
| BCIU | Bay Cities Leasing Company | 0 | 4 |
| BCIX | Blue Circle Incorporated | 0 | 15 |
| BCK | Buffalo Creek Flour | 8 | 4 |
| BCLR | Bay Colony | 8 | 12 |
| BCNE | Canadian National Railway | 0 | 3 |
| BCOL | Canadian National Railways | 139 | 548 |
| BCPM | BCPM | 0 | 1 |
| BCQ | BCQ | 2 | 0 |
| BCR | Bay Coast Railroad | 9 | 4 |
| BCRX | General Electric Rail Services Corporation | 1 | 0 |
| BCSR | Buckeye Central Scenic Railroad | 1 | 0 |
| BCT | BCT | 0 | 1 |
| BDCX | Anchor Glass Container | 0 | 7 |
| BDLX | Big Dog Lines | 33 | 29 |
| BDNX | Baroid Drilling Fluids Incorporated | 0 | 1 |
| BDRV | Belvidere & Delaware Railroad | 11 | 20 |
| BDVR | BDVR | 0 | 1 |
| BDW | Bighorn Divide & Wyoming Railroad | 1 | 15 |
| BE | BE | 1 | 0 |
| BEBX | BEBX | 1 | 0 |
| BECKER | Becker Sand & Gravel | 1 | 0 |
| BECX | FMC Corporation | 0 | 1 |
| BEDT | Brooklyn East District Terminal | 10 | 0 |
| BEPX | Belcher Oil Company | 0 | 2 |
| BER | BER | 1 | 0 |
| BERY | BERY | 6 | 0 |
| BETH | BETH | 1 | 0 |
| BF | BF | 1 | 0 |
| BFBX | Bakery Feeds, Division of Griffin Indust | 0 | 7 |
| BFCR | BFCR | 0 | 1 |
| BFEX | BFEX | 1 | 0 |
| BFGX | Oxy Vinyls LP | 0 | 39 |
| BFIX | Borden Foods | 0 | 1 |
| BFLU | BFLU | 0 | 7 |
| BFPX | Besse Forest Products | 0 | 17 |
| BFRX | Bakery Trading Company | 0 | 7 |
| BFTX | Bill Frank Trucking | 0 | 67 |
| BGAX | BGAX | 0 | 1 |
| BGCM | Bg & Cm Railroad | 4 | 0 |
| BGEX | General American Marks Company | 0 | 13 |
| BGFX | Barnabus Group Foundation | 0 | 1 |
| BGR | BGR | 1 | 0 |
| BGRM | Bluegrass Railroad Museum | 2 | 2 |
| BGRR | Bluegrass Scenic Railroad | 2 | 0 |
| BH | Bath & Hammondsport | 3 | 1 |
| BHC | Black Hills Central | 2 | 0 |
| BHCR | BHCR | 1 | 0 |
| BHCU | Bridgehead Container Service | 0 | 12 |
| BHM | BHM | 1 | 0 |
| BHP | BHP Nevada Railroad Company | 6 | 0 |
| BHRX | Bellefonte Historical Railroad | 2 | 2 |
| BHS | Bonhomie & Hattiesburg Southern | 1 | 0 |
| BIGHOLE | BIGHOLE | 1 | 0 |
| BIGX | Air Liquide America Corporation | 0 | 3 |
| BIPX | Anamax LLC | 0 | 11 |
| BISX | Brandenburg Industrial Service Co | 0 | 25 |
| BITY | Penn Eastern Rail Lines Incorporated | 2 | 0 |
| BJHX | BJ Titan Services Company | 0 | 5 |
| BJOX | Citicorp Railmark, Inc. | 0 | 33 |
| BJRY | Burlington Junction Railway | 10 | 0 |
| BK | BK | 0 | 1 |
| BKRR | Batten Kill Railroad | 2 | 3 |
| BKRU | Baker Tanks | 0 | 1 |
| BKTY | Union Pacific Railroad Company | 0 | 12 |
| BL | BL | 2 | 0 |
| BLA | BLA | 1 | 1 |
| BLACK | BLACK | 1 | 0 |
| BLD | BLD | 2 | 0 |
| BLE | Bessemer & Lake Erie | 84 | 139 |
| BLH | BLH | 1 | 0 |
| BLKU | Bulkhaul Company Limited | 0 | 13 |
| BLMR | Blue Mountain | 6 | 2 |
| BLOL | Bloomer Shippers Connecting Railroad Co. | 7 | 1 |
| BLR | Blackland | 4 | 0 |
| BLRX | BLRX | 0 | 1 |
| BLS | BLS | 1 | 0 |
| BLUE | BLUE | 1 | 0 |
| BLW | Baldwin Locomotive Works | 4 | 0 |
| BM | Boston & Maine | 279 | 259 |
| BMAU | BMAU | 0 | 8 |
| BMC | BMC | 1 | 0 |
| BMCX | Bluewater Michigan Chapter Incorporated | 0 | 7 |
| BMDZ | Minnesota Dakota and Western Railway Com | 0 | 20 |
| BMH | Beaufort and Morehead Railroad Co | 6 | 1 |
| BML | Belfast & Mooshead Lake | 4 | 7 |
| BMN | BMN | 0 | 1 |
| BMR | BMR | 6 | 1 |
| BMRG | Blue Mountain & Reading | 2 | 0 |
| BMS | Berlin Mills | 0 | 4 |
| BMZ | Boston and Maine Corp | 0 | 5 |
| BN | Burlington Northern | 2551 | 4417 |
| BN/GN | BN/GN | 1 | 0 |
| BNA | Burlington Northern Business Cars | 0 | 2 |
| BNAU | Burlington Northern and Santa Fe Railway Company | 0 | 11 |
| BNBX | Greenbrier Management Services, LLC | 0 | 53 |
| BNF | BNF | 2 | 0 |
| BNFE | Burlington Northern Fruit Express | 0 | 151 |
| BNFS | BNFS | 1 | 0 |
| BNFT | Burlington Northern Fuel Tender | 0 | 15 |
| BNG | Blackwell Northern Gateway Railroad Comp | 0 | 1 |
| BNH | BNH | 0 | 2 |
| BNO | Burlington Northern and Santa Fe Railway Company | 0 | 3 |
| BNQ | Burlington Northern and Santa Fe Railway | 0 | 9 |
| BNR | BNR | 1 | 0 |
| BNSF | BNSF Railway | 6908 | 10989 |
| BNSJ | BNSJ | 0 | 1 |
| BNX | BNX | 0 | 60 |
| BNZ | Burlington Northern and Santa Fe Railway | 0 | 18 |
| BO | Baltimore & Ohio | 820 | 502 |
| BOB | BOB | 1 | 0 |
| BOCT | CSX Transportation (Baltimore & Ohio Chicago Terminal Railro | 5 | 0 |
| BOCU | BOCU | 0 | 1 |
| BOCX | BOC Gases | 0 | 2 |
| BOMBARDIER | BOMBARDIER | 1 | 0 |
| BOMX | B&O Railroad Museum Inc. | 6 | 2 |
| BOOTHBAY | BOOTHBAY | 1 | 0 |
| BOP | Border Pacific Railroad Company | 1 | 0 |
| BORX | U.S. Borax Incorporated | 0 | 23 |
| BOTS | BOTS | 0 | 3 |
| BOTX | BOTX | 0 | 2 |
| BOZ | Baltimore & Ohio | 0 | 10 |
| BP | BP | 23 | 1 |
| BPCU | B P Chemicals Belgium | 2 | 0 |
| BPOX | BP Amoco Chemical Comp. BP Oil Division | 0 | 6 |
| BPPX | GATX Capital Corporation | 0 | 1 |
| BPRR | Buffalo and Pittsburgh | 66 | 136 |
| BPRX | BP Amoco Chemical Company Chemical Division | 0 | 28 |
| BPU | BPU | 1 | 0 |
| BR | Buffalo and Pittsburgh | 4 | 43 |
| BR(WR) | BR(WR) | 1 | 0 |
| BR1 | British Railways | 566 | 30 |
| BRAN | Brandon Rail | 0 | 794 |
| BRAX | General American Marks Company | 0 | 57 |
| BRBP | BRBP | 0 | 1 |
| BRC | Belt Railway of Chicago | 76 | 25 |
| BRCX | Union Tank Car Company | 1 | 54 |
| BRE | BRE | 0 | 1 |
| BRG | Brownsville and Rio Grande International Railroad | 3 | 0 |
| BRIMSTONE | BRIMSTONE | 1 | 0 |
| BRIX | Union Tank Car Company | 0 | 99 |
| BRK | BRK | 0 | 2 |
| BRLX | BRLX | 2 | 0 |
| BRMI | BRMI | 3 | 0 |
| BRMX | Berkshire Railway Museum Inc | 4 | 3 |
| BRNZ | Comtrak Incorporated | 0 | 1 |
| BRP | BRP | 1 | 0 |
| BRPX | Blue Ridge Paper | 1 | 0 |
| BRRX | Brooklyn Resource Recovery Incorporated | 0 | 2 |
| BRS | BRS | 0 | 1 |
| BRSR | BRSR | 0 | 8 |
| BRSX | High Sierra Transportation, LLC | 1 | 11 |
| BRT | BRT | 2 | 1 |
| BRW | Black River And Western | 16 | 19 |
| BRWX | BRWX | 0 | 1 |
| BS | Birmingham Southern RR | 39 | 57 |
| BSC | BSC | 8 | 0 |
| BSCX | Bethlehem Steel Corporation | 1 | 7 |
| BSE | Birmingham & Southeastern | 1 | 1 |
| BSEX | Badger State Ethanol Llc | 0 | 9 |
| BSF | BSF | 1 | 0 |
| BSFSR | BSFSR | 1 | 0 |
| BSIU | Blue Sky Intermodal (UK) Ltd | 0 | 35 |
| BSIX | Bethlehem Steel Corporation | 0 | 1 |
| BSIZ | BSIZ | 0 | 1 |
| BSLY | BSLY | 0 | 1 |
| BSM | BSM | 1 | 0 |
| BSNF | BSNF | 2 | 0 |
| BSOR | Buffalo Southern | 9 | 2 |
| BSPR | BSPR | 1 | 0 |
| BSPX | Otter Tail Power Company (S.Dak.) | 0 | 13 |
| BSR | BSR | 4 | 0 |
| BSRR | BSRR | 4 | 0 |
| BSRX | Branson Scenic | 3 | 5 |
| BST | BST | 0 | 1 |
| BSTR | BSTR | 0 | 1 |
| BSTX | Trinitas Corporation | 0 | 1 |
| BSV | BSV | 8 | 1 |
| BSVRR | BSVRR | 2 | 0 |
| BSVY | Boone & Scenic Valley Railroad | 5 | 1 |
| BSX | BSX | 0 | 1 |
| BTCO | Boston Terminal Company | 1 | 0 |
| BTCX | Browner Turnout Company | 0 | 17 |
| BTH | BTH | 2 | 0 |
| BTN | BTN | 0 | 1 |
| BTRX | Rocky Mountain Transportation Services | 0 | 40 |
| BTTX | TTX Company | 0 | 138 |
| BU | BU | 0 | 1 |
| BUCY | BUCY | 0 | 1 |
| BUDD | BUDD | 3 | 0 |
| BUDX | Budd Company (temporary) | 0 | 1 |
| BUEN | BUEN | 0 | 1 |
| BUGX | Bruggere and Monson | 4 | 0 |
| BUKX | Louisville Gas and Electric Company | 0 | 1 |
| BURR | BURR | 0 | 1 |
| BUTT | BUTT | 0 | 1 |
| BVDR | BVDR | 1 | 0 |
| BVRY | Brandywine Valley Railroad Company | 4 | 42 |
| BVS | Bevier and Southern | 1 | 0 |
| BW | BW | 3 | 0 |
| BWCX | GE Plastics | 1 | 7 |
| BWL | BWL | 1 | 0 |
| BWLX | Lansing Board of Power & Light | 1 | 112 |
| BWMX | BWMX | 0 | 1 |
| BX | BX | 0 | 1 |
| BXN | Bauxite and Northern Railway Company | 3 | 0 |
| BYCX | Chelatchie Prairie Railroad | 1 | 2 |
| BZ | BZ | 2 | 0 |
| C | C | 1 | 1 |
| C0 | C0 | 0 | 1 |
| C58 | C58 | 1 | 0 |
| CA | Chesapeake & Albemarle | 5 | 1 |
| CAB | CAB | 0 | 3 |
| CABO | CABO | 0 | 2 |
| CABX | Cabot Corporation | 0 | 45 |
| CACV | Delaware Otswego | 5 | 3 |
| CACX | Cooperstown & Charlotte Valley Railroad | 0 | 1 |
| CAD | Cadiz Railroad | 1 | 0 |
| CADU | CADU | 0 | 1 |
| CAE | Chicago Aurora & Elgin | 4 | 0 |
| CAEG | Coffeen and Western | 0 | 367 |
| CAGX | MHC Incorporated Subsidiary of ConAgra Incorporated | 9 | 270 |
| CAGY | Columbus & Greenville Railway | 40 | 121 |
| CAIU | Container Applications International | 0 | 17 |
| CAIZ | CAIZ | 3 | 0 |
| CALA | Carolina Southern | 10 | 0 |
| CALTRAIN | CALTRAIN | 2 | 0 |
| CALU | CALU | 0 | 1 |
| CALX | California Railcar Corporation | 0 | 7 |
| CAMBRIA | CAMBRIA | 1 | 0 |
| CAMP | CAMP | 1 | 1 |
| CANAC | CANAC | 1 | 0 |
| CAND | CAND | 0 | 1 |
| CANTON | CANTON | 3 | 0 |
| CANX | CANAC International | 21 | 8 |
| CAOX | Westlake CA and O | 0 | 2 |
| CAR | CAR | 1 | 2 |
| CARGILL | CARGILL | 2 | 0 |
| CARI | CARI | 0 | 1 |
| CARR | Carrollton Railroad | 2 | 0 |
| CART | CART | 1 | 0 |
| CARTIER | CARTIER | 19 | 0 |
| CARU | Caru | 0 | 8 |
| CARX | Caliber Auto Transfer | 3 | 0 |
| CASS | Cass Scenic | 8 | 2 |
| CASU | Hapag Lloyd Container Line | 0 | 6 |
| CAT | Central Arkansas Transit | 5 | 0 |
| CATP | CATP | 0 | 2 |
| CATS | Charlotte Area Transit System | 14 | 4 |
| CATU | CATU Containers S.A. | 0 | 3 |
| CATX | General American Marks Company | 0 | 20 |
| CAXU | Container Applications International Incorporated | 0 | 386 |
| CAXX | CEMENTO CRUZ AZUL | 0 | 2 |
| CB | CB | 0 | 1 |
| CBCX | Morton International | 0 | 1 |
| CBFU | CBFU | 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 | 356 |
| CBL | Conemaugh and Black Lick Railroad | 3 | 3 |
| CBM | CBM | 0 | 1 |
| CBNS | Cape Breton & Central Nova Scotia Ry | 27 | 11 |
| CBP | CBP | 2 | 0 |
| CBPX | Custom Building Products | 0 | 3 |
| CBQ | Chicago Burlington & Quincy | 405 | 207 |
| CBQX | CBQX | 0 | 1 |
| CBQZ | Burlington Northern and Santa Fe Railway Company | 0 | 2 |
| CBR | CBR | 1 | 0 |
| CBRM | Chillicothe-Brunswick Rail Maintenance | 2 | 1 |
| CBRW | Columbia Basin Railroad | 11 | 37 |
| CBRX | Charles Barthold | 0 | 7 |
| CBRY | Copper Basin Railway | 15 | 49 |
| CBT | CBT | 1 | 0 |
| CBTU | CBTU | 1 | 0 |
| CBX | CBX | 1 | 0 |
| CC | Chicago Central & Pacific | 83 | 160 |
| CCBX | Union Carbide Corporation | 0 | 354 |
| CCC | Cape Cod Central | 2 | 0 |
| CCCL | Connecticut Central Railroad Company | 2 | 1 |
| CCCX | CII Carbon, LLC | 0 | 5 |
| CCCZ | Compass Container Co Incorporated | 0 | 1 |
| CCEH | CCEH | 0 | 1 |
| CCEX | CCC Transport Company | 0 | 6 |
| CCGX | Cando Contracting Limited | 3 | 2 |
| CCH | Cape Cod & Hyannis | 1 | 1 |
| CCKX | CCKX Incorporated | 0 | 2 |
| CCKY | Chattooga & Chickamauga Railway | 3 | 0 |
| CCLU | Char Ching Shipping (USA) Limited | 0 | 533 |
| CCLX | Crystal Car Line | 6 | 355 |
| CCO | Clinchfield | 1 | 7 |
| CCOR | CCOR | 0 | 1 |
| CCP | CCP | 8 | 3 |
| CCR | Kansas City Southern | 2 | 44 |
| CCRA | Camp Chase Industrial Railroad Corporati | 4 | 0 |
| CCRG | CCRG | 2 | 0 |
| CCRR | Claremont Concord | 5 | 1 |
| CCRU | Compagnie Des Containers Reservoir | 0 | 1 |
| CCRX | Coastal Refining and Marketing Incorporated | 1 | 1 |
| CCRY | Charles City Rail Lines Incorporated | 1 | 0 |
| CCS | CCS | 1 | 0 |
| CCSS | CCSS | 0 | 1 |
| CCT | Central California Traction Company | 8 | 1 |
| CCTR | CCTR | 1 | 0 |
| CCTX | Coleto Creek Power WLE, LP | 0 | 20 |
| CCUO | Chicago-Chemung Railroad Corporation | 1 | 0 |
| CCV | CCV | 3 | 0 |
| CCW | Charles City & Western | 1 | 0 |
| CCWNC | CCWNC | 1 | 0 |
| CCX | Columbian Chemicals Co | 1 | 77 |
| CCZ | CCZ | 0 | 1 |
| CD | Ceske Drahy | 31 | 1 |
| CDAC | Canadian American | 11 | 0 |
| CDAU | Canadian Tire Corporation Limited | 0 | 5 |
| CDCX | Air Liquide America Corporation | 0 | 3 |
| CDEGC | CDEGC | 1 | 0 |
| CDEX | Coastal Distribution, LLC | 0 | 15 |
| CDHX | Caledonian Rail Lines, LLC | 0 | 1 |
| CDME | CDME | 1 | 0 |
| CDOT | Conneticut Department of Transportation | 57 | 12 |
| CDPU | CDPU | 0 | 1 |
| CDTX | California DOT | 41 | 38 |
| CDWX | M-R Logistics, LLC | 0 | 4 |
| CDX | CDX | 1 | 0 |
| CE | CE | 2 | 0 |
| CEAD | CEAD | 0 | 1 |
| CEBX | Combustion Engineering Incorporated | 0 | 3 |
| CEDA | CEDA | 0 | 2 |
| CEDX | G.S.S.&M. Inc, Rail Division | 0 | 8 |
| CEEC | Coast Engine and Equipment Co | 1 | 0 |
| CEFX | CIT Group/Capital Finance, Inc | 373 | 3902 |
| CEI | Chicago & Eastern Illinois | 16 | 12 |
| CEIW | Central Indiana and Western RR Company | 1 | 0 |
| CEIX | CEIX | 5 | 0 |
| CELX | Celtran Incorporated (Hoechst Celanese Corp) | 0 | 129 |
| CEMEX | CEMEX | 1 | 0 |
| CEMR | Central Manitoba Railway Incorporated | 5 | 0 |
| CEMX | Cemex Mexico SA de CV | 1 | 38 |
| CENTRAL | CENTRAL | 20 | 0 |
| CEPX | Trinity Industries Leasing | 0 | 1 |
| CEPZ | CEPZ | 0 | 3 |
| CERA | Central RR of Indianapolis | 12 | 1 |
| CERFX | CERFX | 1 | 0 |
| CERX | ER Carpenter LLP | 1 | 15 |
| CESX | CESX | 2 | 7 |
| CETX | CETX | 0 | 1 |
| CEWX | Canadian Enterprise Gas Products | 0 | 4 |
| CEX | CEX | 0 | 1 |
| CF | Cape Fear Railways Incorporated | 2 | 1 |
| CFB | CFB | 0 | 1 |
| CFCLA | CFCLA | 5 | 0 |
| CFE | Chicago, Fort Wayne and Eastern | 10 | 0 |
| CFER | CFER | 1 | 0 |
| CFEX | CFEX | 3 | 3 |
| CFI | CFI | 1 | 1 |
| CFIZ | CFIZ | 1 | 2 |
| CFKZ | XTRA Intermodal | 0 | 92 |
| CFL | Cf Lanaudiere Inc. | 1 | 0 |
| CFM | CFM | 2 | 0 |
| CFMG | Chemin De Fer De La Matapedia Et Du Golf | 6 | 2 |
| CFMX | Cargill Incorporated | 0 | 31 |
| CFNF | CFNF | 1 | 0 |
| CFNR | California Northern | 13 | 2 |
| CFQ | CFQ | 1 | 0 |
| CFSX | C and T Refinery Incorporated | 0 | 1 |
| CFW | Caney fork & Western | 0 | 2 |
| CFWR | Caney Fork and Western Railroad | 5 | 27 |
| CFZ | CFZ | 0 | 5 |
| CG | Central Of Georgia | 14 | 38 |
| CGAX | Cargill Incorporated C.G.D. Division | 7 | 113 |
| CGB | CGB | 2 | 0 |
| CGBX | Dow Chemical Canada Incorporated | 0 | 3 |
| CGCX | Cargill Incorporated C.G.D. Division | 2 | 48 |
| CGEX | Cargill Incorporated C.G.D. Division | 0 | 177 |
| CGFX | Consolidated Gas Company of Florida | 1 | 0 |
| CGI | CGI | 1 | 0 |
| CGIX | CGIX | 1 | 0 |
| CGLX | GATX Rail Canada | 0 | 292 |
| CGMX | GATX Rail Canada | 0 | 2 |
| CGNE | Champagne Railroad Incorporated | 0 | 1 |
| CGOX | Cargill Incorporated | 0 | 112 |
| CGR | CG Railway, Inc | 1 | 20 |
| CGRX | Consolidated Grain and Barge | 8 | 10 |
| CGTU | Compagnie Generale Maritime (French Line) | 0 | 1 |
| CGTX | GATX Rail Canada | 0 | 237 |
| CGW | Chicago Great Western | 97 | 51 |
| CGWX | Crete Grain Co Inc | 1 | 0 |
| CH | Calumet & Hecla | 1 | 1 |
| CH-M | CH-M | 8 | 0 |
| CHAE | CHAE | 0 | 1 |
| CHAP | CHAP | 1 | 1 |
| CHAR | CHAR | 0 | 1 |
| CHARLOAIS | CHARLOAIS | 1 | 0 |
| CHAT | Chattahoochee & Gulf | 5 | 0 |
| CHCO | Chesanning & Owasso Central | 1 | 0 |
| CHES | CHES | 0 | 7 |
| CHEX | Equistar Chemicals, LP | 0 | 3 |
| CHFU | Challenge International | 0 | 1 |
| CHGX | CHGX | 1 | 0 |
| CHHX | CHHX | 0 | 1 |
| CHINA | CHINA | 1 | 0 |
| CHIU | Capital Lease |
