AOK
| Arkansas-Oklahoma Railroad | 4 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 30 |
CN
| Canadian National Railways | 15 |
CNA
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 5 |
CSX
| CSX Railroad | 20 |
FEC
| Florida East Coast | 2 |
FXE
| Ferromex | 39 |
GTW
| Grand Trunk Western | 3 |
KCS
| Kansas City Southern | 34 |
KCSM
| Kansas City Southern De Mexico | 2 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 5 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TOAX
| TTX Company - Autoracks | 3 |
TR
| Tomahawk Railway L.P. | 1 |
TTLX
| TTX Company-Spine Cars | 1 |
UP
| Union Pacific Railroad Company | 1 |