AMTK
| Amtrak | 30 |
CRIP
| Chicago Rock Island & Pacific | 2 |
OKRX
| Oklahoma Railway Museum Ltd | 4 |
PPCX
| AAPRCO Register Private Cars | 4 |
RPCX
| Railroad Passenger Car Numbering Bureau | 3 |
SCAX
| SOUTHERN CALIFORNIA REGIONAL RAIL AUTHORITY | 1 |
TRWX
| Trinity Railway Express | 12 |
UPP
| Union Pacific Passenger | 6 |