ATW
| Atlantic and Western | 1 |
BVRY
| Brandywine Valley Railroad Company | 1 |
CN
| Canadian National Railways | 1 |
CR
| Conrail | 2 |
CSX
| CSX Railroad | 7 |
CW
| Colorado and Wyoming | 1 |
DODX
| Department Of Defense | 41 |
FEC
| Florida East Coast | 3 |
GNWR
| Genesee and Wyoming Railroad Company | 3 |
HTTX
| TTX Company | 21 |
ITDX
| SULCOM Incorporated | 1 |
ITTX
| TTX Company | 14 |
KRL
| Kasgro Rail Lines | 4 |
MTTX
| TTX Company | 4 |
NS
| Norfolk Southern | 3 |
NW
| Norfolk & Western | 4 |
PTTX
| TTX Company | 6 |
QTTX
| TTX Company | 7 |
SOU
| Southern | 4 |
TTDX
| TTX Company - DOD Service Flats | 2 |
TTHX
| TTX Company - Flat Cars | 28 |
TTJX
| TTX Company-Bulkhead Flats | 2 |
TTX
| TTX Company | 5 |
TZPR
| Tazewell & Peoria Railroad | 9 |
UP
| Union Pacific Railroad Company | 1 |
XTTX
| TTX Company | 1 |