BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 3 |
FP
| Fordyce & Princeton Railroad Company | 2 |
GACX
| General American Marks Company | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
KCS
| Kansas City Southern | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
RBOX
| Railbox Company | 2 |
SOU
| Southern | 1 |
TBOX
| TTX Company | 3 |