AOK
| Arkansas-Oklahoma Railroad | 54 |
ATW
| Atlantic and Western | 32 |
BCOL
| Canadian National Railways | 24 |
BNSF
| BNSF Railway | 20 |
CBRY
| Copper Basin Railway | 5 |
CN
| Canadian National Railways | 44 |
CNIS
| Canadian National Railways | 7 |
COER
| Crab Orchard & Egyptian | 24 |
CRLE
| Coe Rail Incorporated | 3 |
DWC
| Canadian National Railways | 35 |
FDDM
| Fort Dodge Des Moines & Southern | 46 |
GMRC
| Green Mountain RR | 1 |
GNRR
| Georgia Northeastern | 5 |
GTW
| Grand Trunk Western | 10 |
HLSC
| Hampton Railway Incorporated | 7 |
IANR
| Iowa Northern Ry | 8 |
IC
| Illinois Central | 14 |
KCS
| Kansas City Southern | 2 |
KLRX
| KOCH RAIL LLC | 5 |
LRS
| Laurinburg and Southern | 1 |
LRWN
| Little Rock & Western | 3 |
LW
| Louisville and Wadley Railway Company | 6 |
NDYX
| First Union Rail | 2 |
NGSX
| NGSX | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 70 |
NS
| Norfolk Southern | 1 |
ONT
| Ontario Northland Railway | 1 |
RVPR
| Riverport R.R., L.L.C. | 3 |
SERA
| Sierra Northern Railway | 3 |
SMW
| St Marys Railway West LLC | 11 |
SOO
| Soo Line | 35 |
TR
| Tomahawk Railway L.P. | 13 |
TTZX
| TTX Company-Centerbeam Flats | 271 |
UCIR
| Union County Industrial Railroad | 2 |
UCRY
| Utah Central | 12 |
UP
| Union Pacific Railroad Company | 26 |
WC
| Wisconsin Central | 35 |
WFRX
| WELLS FARGO RAIL CORPORATION | 1 |
WRWK
| Providence & Worchester Railroad | 9 |