CPAA
| Canadian Pacific Railway | 2 |
FSRR
| FerroSur | 6 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
RBOX
| Railbox Company | 34 |
RGCX
| Rio Grande Chemical LTD | 2 |
SGLR
| Seminole Gulf | 2 |
TFM
| Kansas City Southern De Mexico | 2 |
TSE
| Texas South-Eastern Railroad Company | 2 |