ACL
| Atlantic Coast Line | 2 |
BBCX
| ABB Power Generation Incorporated | 1 |
BO
| Baltimore & Ohio | 1 |
CO
| Chesapeake & Ohio | 13 |
CPR
| Canadian Pacific Railway | 2 |
CR
| Conrail | 2 |
CSP
| Camas Prairie RailNet Incorporated | 4 |
CSX
| CSX Railroad | 9 |
GFRR
| Georgia and Florida Railnet | 1 |
HOG
| Heart of Georgia | 5 |
IC
| Illinois Central | 1 |
LN
| Louisville & Nashville | 3 |
MP
| Missouri Pacific | 1 |
MSRC
| Kansas City Southern | 1 |
RI
| RI | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 2 |
SALV
| SALV | 1 |
SBD
| Seaboard System | 3 |
SCL
| Seaboard Coast Line | 3 |
SEAB
| SEAB | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
WM
| Western Maryland | 1 |