AERC
| Albany and Eastern Railroad Company | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 15 |
DODX
| Department Of Defense | 4 |
DRGW
| Denver & Rio Grande Western | 1 |
FURX
| First Union Rail | 1 |
HTTX
| TTX Company | 11 |
ITTX
| TTX Company | 3 |
JTTX
| TTX Company | 1 |
KRL
| Kasgro Rail Lines | 4 |
LTTX
| TTX Company | 2 |
MP
| Missouri Pacific | 1 |
OTTX
| TTX Company | 5 |
PTTX
| TTX Company | 3 |
QTTX
| TTX Company | 16 |
QUAX
| Redstreak, LLC | 1 |
RTTX
| TTX Company | 1 |
SI
| Union Pacific Railroad Company (Spokane International) | 2 |
SJTX
| Stella Jones, Inc | 1 |
SOO
| Soo Line | 1 |
SPMW
| Southern Pacific Maintenance of Way | 2 |
TTHX
| TTX Company - Flat Cars | 2 |
TZPR
| Tazewell & Peoria Railroad | 1 |
UP
| Union Pacific Railroad Company | 5 |
WPRR
| Willamette and Pacific | 2 |
XTTX
| TTX Company | 1 |