AOK
| Arkansas-Oklahoma Railroad | 29 |
ATW
| Atlantic and Western | 37 |
BCOL
| Canadian National Railways | 23 |
BNSF
| BNSF Railway | 2 |
CBRY
| Copper Basin Railway | 6 |
CN
| Canadian National Railways | 37 |
CNA
| Canadian National Railways | 1 |
CNIS
| Canadian National Railways | 5 |
COER
| Crab Orchard & Egyptian | 6 |
CSX
| CSX Railroad | 2 |
DWC
| Canadian National Railways | 37 |
FDDM
| Fort Dodge Des Moines & Southern | 1 |
FURX
| First Union Rail | 1 |
GNRR
| Georgia Northeastern | 10 |
GTW
| Grand Trunk Western | 22 |
IANR
| Iowa Northern Ry | 5 |
IC
| Illinois Central | 9 |
KCS
| Kansas City Southern | 1 |
KLRX
| KOCH RAIL LLC | 2 |
LRS
| Laurinburg and Southern | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 52 |
NS
| Norfolk Southern | 1 |
ONT
| Ontario Northland Railway | 2 |
RVPR
| Riverport R.R., L.L.C. | 7 |
SGLR
| Seminole Gulf | 1 |
SMW
| St Marys Railway West LLC | 31 |
SNC
| Saratoga & North Creek Railway | 12 |
SOO
| Soo Line | 3 |
TR
| Tomahawk Railway L.P. | 8 |
TTZX
| TTX Company-Centerbeam Flats | 18 |
UCIR
| Union County Industrial Railroad | 3 |
UCRY
| Utah Central | 22 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 31 |
WRWK
| Providence & Worchester Railroad | 16 |