AOK
| Arkansas-Oklahoma Railroad | 20 |
ATSF
| Atchison Topeka & Santa Fe | 16 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 56 |
BTCX
| Browner Turnout Company | 29 |
BTFX
| BTFX | 4 |
BTTX
| TTX Company - Autoracks | 1 |
CIGX
| THE CIT GROUP/CAPITAL FINANCE, INC. | 1 |
CITX
| CIT Group/Capital Finance, Inc | 3 |
CN
| Canadian National Railways | 1 |
CNA
| Canadian National Railways | 10 |
CP
| Canadian Pacific Railway | 2 |
CR
| Conrail | 2 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 3 |
CW
| Colorado and Wyoming | 8 |
EBTX
| English Boiler & Tube | 1 |
FRR
| Falls Road Railroad Company Incorporated | 5 |
FTTX
| TTX Company | 215 |
GBRX
| Greenbrier Leasing Corporation | 6 |
GIMX
| General American Marks Company | 5 |
GNWR
| Genesee and Wyoming Railroad Company | 16 |
GTTX
| TTX Company - Flat Cars | 9 |
GTW
| Grand Trunk Western | 9 |
HZGX
| Herzog Contracting Corporation | 2 |
ITTX
| TTX Company | 784 |
JOBX
| Tealinc Limited | 1 |
JTTX
| TTX Company | 47 |
KCS
| Kansas City Southern | 3 |
LBR
| Lowville and Beaver River Railroad Compa | 35 |
MP
| Missouri Pacific | 9 |
MRL
| Montana Rail Link | 2 |
MTTX
| TTX Company | 10 |
NS
| Norfolk Southern | 37 |
NTTX
| TTX Company | 1 |
NYC
| New York Central | 1 |
ONT
| Ontario Northland Railway | 2 |
PEYX
| Transportation Technology Services Inc | 95 |
PRSX
| Progress Rail Service | 1 |
PTTX
| TTX Company | 228 |
QUAX
| Redstreak, LLC | 13 |
SFS
| Santa Fe Southern | 5 |
SOU
| Southern | 25 |
SP
| Southern Pacific | 10 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
STPX
| Strategic Transport Systems Incorporated | 2 |
TFWX
| TTX COMPANY | 4 |
TOEX
| TOEX | 8 |
TPDX
| TPDX | 3 |
TTDX
| TTX Company - DOD Service Flats | 145 |
TTIX
| TTX | 1 |
TTXX
| TTX Company | 31 |
TTYX
| TTX Company | 2 |
UP
| Union Pacific Railroad Company | 1 |