AOK
| Arkansas-Oklahoma Railroad | 14 |
ATW
| Atlantic and Western | 14 |
BCOL
| Canadian National Railways | 11 |
BNSF
| BNSF Railway | 5 |
CN
| Canadian National Railways | 17 |
COER
| Crab Orchard & Egyptian | 2 |
CSX
| CSX Railroad | 1 |
DWC
| Canadian National Railways | 10 |
FURX
| First Union Rail | 2 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 1 |
GTW
| Grand Trunk Western | 2 |
HLSC
| Hampton Railway Incorporated | 1 |
IC
| Illinois Central | 2 |
KCS
| Kansas City Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
NDYX
| First Union Rail | 6 |
NOKL
| Northwestern Oklahoma | 19 |
NS
| Norfolk Southern | 1 |
NSSX
| National Salvage and Service Corporation | 1 |
SMW
| St Marys Railway West LLC | 5 |
SOO
| Soo Line | 31 |
TR
| Tomahawk Railway L.P. | 8 |
TTZX
| TTX Company-Centerbeam Flats | 53 |
UCRY
| Utah Central | 4 |
UP
| Union Pacific Railroad Company | 1 |
WC
| Wisconsin Central | 11 |
WRWK
| Providence & Worchester Railroad | 5 |