AOK
| Arkansas-Oklahoma Railroad | 2 |
BNSF
| BNSF Railway | 4 |
CNA
| Canadian National Railways | 1 |
COER
| Crab Orchard & Egyptian | 1 |
CUOH
| Columbus and Ohio River Railroad Company | 1 |
FBOX
| TTX Company | 4 |
IBT
| International Bridge and Terminal Company | 5 |
LRS
| Laurinburg and Southern | 1 |
NOKL
| Northwestern Oklahoma | 1 |
SP
| Southern Pacific | 1 |
TR
| Tomahawk Railway L.P. | 3 |