AOK
| Arkansas-Oklahoma Railroad | 16 |
ATW
| Atlantic and Western | 21 |
BCOL
| Canadian National Railways | 14 |
BNSF
| BNSF Railway | 7 |
CBRY
| Copper Basin Railway | 1 |
CN
| Canadian National Railways | 19 |
CNIS
| Canadian National Railways | 1 |
COER
| Crab Orchard & Egyptian | 5 |
CSX
| CSX Railroad | 2 |
DWC
| Canadian National Railways | 15 |
FDDM
| Fort Dodge Des Moines & Southern | 1 |
FURX
| First Union Rail | 3 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 1 |
GTW
| Grand Trunk Western | 3 |
HLSC
| Hampton Railway Incorporated | 1 |
IC
| Illinois Central | 4 |
KCS
| Kansas City Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
NDYX
| First Union Rail | 6 |
NOKL
| Northwestern Oklahoma | 29 |
NS
| Norfolk Southern | 2 |
NSSX
| National Salvage and Service Corporation | 1 |
SMW
| St Marys Railway West LLC | 11 |
SOO
| Soo Line | 45 |
TR
| Tomahawk Railway L.P. | 9 |
TTZX
| TTX Company-Centerbeam Flats | 75 |
UCRY
| Utah Central | 5 |
UP
| Union Pacific Railroad Company | 1 |
WC
| Wisconsin Central | 13 |
WRWK
| Providence & Worchester Railroad | 7 |