AOK
| Arkansas-Oklahoma Railroad | 4 |
ATW
| Atlantic and Western | 1 |
BCOL
| Canadian National Railways | 3 |
BNSF
| BNSF Railway | 1 |
CBRY
| Copper Basin Railway | 1 |
CN
| Canadian National Railways | 1 |
CNIS
| Canadian National Railways | 1 |
COER
| Crab Orchard & Egyptian | 5 |
DWC
| Canadian National Railways | 1 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 2 |
HLSC
| Hampton Railway Incorporated | 1 |
IANR
| Iowa Northern Ry | 2 |
MMA
| Montreal, Maine & Atlantic | 3 |
NDYX
| First Union Rail | 2 |
NOKL
| Northwestern Oklahoma | 4 |
ONT
| Ontario Northland Railway | 2 |
SMW
| St Marys Railway West LLC | 2 |
SOO
| Soo Line | 3 |
TR
| Tomahawk Railway L.P. | 2 |
TTZX
| TTX Company-Centerbeam Flats | 24 |
WC
| Wisconsin Central | 2 |
WRWK
| Providence & Worchester Railroad | 2 |