APAX
| Cimentos Apasco S.A. De C.V. | 1 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
AZER
| Arizona Eastern Railway Company | 3 |
BKTY
| Union Pacific Railroad Company | 2 |
BNSF
| BNSF Railway | 1 |
CN
| Canadian National Railways | 1 |
CNA
| Canadian National Railways | 2 |
CNW
| Chicago & Northwestern | 2 |
FBOX
| TTX Company | 1 |
FSRR
| FerroSur | 41 |
FSSR
| FSSR | 1 |
FXE
| Ferromex | 90 |
HS
| H and S Railroad Company | 1 |
LRS
| Laurinburg and Southern | 2 |
NDEM
| NDEM | 7 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 3 |
NN
| Northern Nevada Railroad Corporation | 1 |
NS
| Norfolk Southern | 1 |
NYC
| New York Central | 1 |
RBOX
| Railbox Company | 6 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TBOX
| TTX Company | 1 |
WC
| Wisconsin Central | 1 |