AOK
| Arkansas-Oklahoma Railroad | 3 |
ATW
| Atlantic and Western | 6 |
BCOL
| Canadian National Railways | 2 |
BNSF
| BNSF Railway | 8 |
CN
| Canadian National Railways | 3 |
COER
| Crab Orchard & Egyptian | 7 |
CSX
| CSX Railroad | 5 |
DWC
| Canadian National Railways | 1 |
FDDM
| Fort Dodge Des Moines & Southern | 7 |
FURX
| First Union Rail | 2 |
GACX
| General American Marks Company | 1 |
GAEX
| General American Marks Company | 2 |
GNRR
| Georgia Northeastern | 2 |
GTW
| Grand Trunk Western | 3 |
IANR
| Iowa Northern Ry | 1 |
IC
| Illinois Central | 1 |
KLRX
| KOCH RAIL LLC | 1 |
NDYX
| First Union Rail | 1 |
NOKL
| Northwestern Oklahoma | 4 |
NRLX
| CIT Group/Capital Finance, Inc | 1 |
NS
| Norfolk Southern | 14 |
SMW
| St Marys Railway West LLC | 5 |
SOO
| Soo Line | 8 |
TR
| Tomahawk Railway L.P. | 6 |
TTPX
| TTX Company - Bulkhead Flats | 1 |
TTZX
| TTX Company-Centerbeam Flats | 22 |
UCIR
| Union County Industrial Railroad | 3 |
UCRY
| Utah Central | 1 |
UP
| Union Pacific Railroad Company | 3 |
WC
| Wisconsin Central | 1 |
WRWK
| Providence & Worchester Railroad | 9 |