AMTK
| Amtrak | 4 |
DOTX
| USDOT/Federal Railroad Administration | 7 |
JES
| JES | 2 |
MARC
| Maryland Transit Administration | 3 |
MRLX
| Mid America Rail Car Leasing | 1 |
NRHX
| National Railway Historical Society | 3 |
PPCX
| AAPRCO Register Private Cars | 7 |
RBBX
| Ringling Bros. and Barnum and Bailey | 3 |