AMTK
| Amtrak | 10 |
AOE
| American Orient Express | 2 |
CFNR
| California Northern | 1 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
JPBX
| Joint Powers Board (CalTrain) | 2 |
NVRR
| NAPA Valley Railroad Company | 2 |
PPCX
| AAPRCO Register Private Cars | 5 |
PRWX
| Railway Entertainment Services Inc. | 1 |
RCPX
| Railcar Limited | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 1 |