AOK
| Arkansas-Oklahoma Railroad | 12 |
ATW
| Atlantic and Western | 5 |
BCIT
| Canadian National Railways | 4 |
BCOL
| Canadian National Railways | 20 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 2 |
CBRY
| Copper Basin Railway | 2 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CLC
| Columbia and Cowlitz Railway Company | 3 |
CN
| Canadian National Railways | 10 |
CNA
| Canadian National Railways | 1 |
CNIS
| Canadian National Railways | 4 |
CRLE
| Coe Rail Incorporated | 2 |
DWC
| Canadian National Railways | 8 |
FCEN
| Florida Central | 1 |
FDDM
| Fort Dodge Des Moines & Southern | 14 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 5 |
GTW
| Grand Trunk Western | 2 |
HE
| Hollis and Eastern Railroad Company | 11 |
HLSC
| Hampton Railway Incorporated | 14 |
IBT
| International Bridge and Terminal Company | 1 |
IC
| Illinois Central | 8 |
KLRX
| KOCH RAIL LLC | 1 |
LW
| Louisville and Wadley Railway Company | 2 |
MSDR
| Knoxville & Holston River Railroad | 1 |
MSRC
| Kansas City Southern | 8 |
MWNX
| MWNX | 2 |
NOKL
| Northwestern Oklahoma | 33 |
NS
| Norfolk Southern | 4 |
RVPR
| Riverport R.R., L.L.C. | 1 |
SERA
| Sierra Northern Railway | 6 |
SMW
| St Marys Railway West LLC | 6 |
SOO
| Soo Line | 7 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 1 |
TKEN
| Tennken Railroad Company Incorporated | 1 |
TNER
| Texas Northeastern Division Mid-Michigan | 2 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TR
| Tomahawk Railway L.P. | 2 |
TTZX
| TTX Company-Centerbeam Flats | 99 |
UCRY
| Utah Central | 3 |
UP
| Union Pacific Railroad Company | 53 |
WC
| Wisconsin Central | 6 |
WCRC
| Washington Central | 1 |
WP
| Western Pacific | 1 |
WPRR
| Willamette and Pacific | 2 |
WRWK
| Providence & Worchester Railroad | 14 |