CP
| Canadian Pacific Railway | 2 |
CSX
| CSX Railroad | 2 |
DODX
| Department Of Defense | 7 |
ECXX
| East Carbon Development Company | 3 |
FEC
| Florida East Coast | 3 |
ITTX
| TTX Company | 3 |
JTTX
| TTX Company | 1 |
KCS
| Kansas City Southern | 3 |
KRL
| Kasgro Rail Lines | 1 |
MP
| Missouri Pacific | 18 |
MTTX
| TTX Company | 1 |
OTTX
| TTX Company | 2 |
PPU
| Tazewell & Peoria Railroad | 1 |
QTTX
| TTX Company | 4 |
RTIX
| RTI - Railroad Services | 7 |
RTTX
| TTX Company | 1 |
SP
| Southern Pacific | 2 |
SPMW
| Southern Pacific Maintenance of Way | 9 |
SPSX
| Progress Rail Services Corp | 13 |
TTHX
| TTX Company - Flat Cars | 1 |
UP
| Union Pacific Railroad Company | 50 |
USAX
| United States Army | 6 |
XTTX
| TTX Company | 8 |