ATW
| Atlantic and Western | 1 |
BKTY
| Union Pacific Railroad Company | 7 |
CNA
| Canadian National Railways | 1 |
CPAA
| Canadian Pacific Railway | 1 |
CRLE
| Coe Rail Incorporated | 2 |
CSX
| CSX Railroad | 3 |
DRGW
| Denver & Rio Grande Western | 1 |
FBOX
| TTX Company | 1 |
FCRD
| First Coast Railway | 1 |
GTW
| Grand Trunk Western | 4 |
HPJX
| Helm-Pacific Leasing | 1 |
IBT
| International Bridge and Terminal Company | 1 |
KCS
| Kansas City Southern | 1 |
LBR
| Lowville and Beaver River Railroad Compa | 1 |
LRS
| Laurinburg and Southern | 1 |
MB
| Meridian & Bigbee | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MP
| Missouri Pacific | 1 |
MRL
| Montana Rail Link | 1 |
MTNR
| Mississippi Tennessee Railroad LLC | 2 |
MWCX
| Midwest Railcar Corporation | 2 |
NOKL
| Northwestern Oklahoma | 3 |
NS
| Norfolk Southern | 4 |
RBOX
| Railbox Company | 4 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
SNC
| Saratoga & North Creek Railway | 1 |
SP
| Southern Pacific | 3 |
SRN
| Sabine River & Northern | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 3 |
TBOX
| TTX Company | 5 |
TCWR
| Twin Cities and Western | 1 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 3 |