ABOX
| TTX Company | 1 |
AGR
| Alabama and Gulf Coast | 1 |
ALY
| Allegheny and Eastern Railroad Incorpora | 2 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
ATW
| Atlantic and Western | 22 |
BCOL
| Canadian National Railways | 1 |
BKTY
| Union Pacific Railroad Company | 6 |
BNSF
| BNSF Railway | 2 |
CIRR
| Chattahoochee Industrial Railroad | 4 |
CMHX
| CarMath Incorporated | 2 |
CMQ
| CENTRAL MAINE & QUEBEC RAILWAY | 1 |
CN
| Canadian National Railways | 9 |
CNA
| Canadian National Railways | 4 |
CNIS
| Canadian National Railways | 4 |
CP
| Canadian Pacific Railway | 1 |
CPAA
| Canadian Pacific Railway | 1 |
CR
| Conrail | 3 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 21 |
EEC
| East Erie Commercial Railroad | 9 |
FBOX
| TTX Company | 6 |
FCRD
| First Coast Railway | 1 |
FXE
| Ferromex | 2 |
GACX
| General American Marks Company | 3 |
GMRC
| Green Mountain RR | 1 |
GNRR
| Georgia Northeastern | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
GTRA
| Golden Triangle Railroad | 1 |
GTW
| Grand Trunk Western | 1 |
HPJX
| Helm-Pacific Leasing | 3 |
HS
| H and S Railroad Company | 9 |
IANR
| Iowa Northern Ry | 1 |
IC
| Illinois Central | 1 |
KCS
| Kansas City Southern | 5 |
LRS
| Laurinburg and Southern | 2 |
MB
| Meridian & Bigbee | 1 |
NADX
| General Electric Rail Services | 3 |
NOKL
| Northwestern Oklahoma | 2 |
NS
| Norfolk Southern | 35 |
NW
| Norfolk & Western | 2 |
PBRX
| TYSON FRESH MEATS | 1 |
PDRR
| Pee Dee River RR | 1 |
RBOX
| Railbox Company | 9 |
SLC
| San Luis Central Railroad Company | 1 |
SMW
| St Marys Railway West LLC | 2 |
SOO
| Soo Line | 1 |
SOU
| Southern | 33 |
SP
| Southern Pacific | 6 |
SRN
| Sabine River & Northern | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TB
| TB | 1 |
TBOX
| TTX Company | 18 |
TR
| Tomahawk Railway L.P. | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 1 |
WRWK
| Providence & Worchester Railroad | 1 |
YB
| Youngstown Belt Railroad Company | 1 |