ARZC
| Arizona and California Railroad | 4 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
AZER
| Arizona Eastern Railway Company | 1 |
DODX
| Department Of Defense | 1 |
DRGW
| Denver & Rio Grande Western | 3 |
FEC
| Florida East Coast | 1 |
FXE
| Ferromex | 1 |
GBRX
| Greenbrier Leasing Corporation | 1 |
HTPX
| HTPX | 1 |
HTTX
| TTX Company | 1 |
ITTX
| TTX Company | 1 |
JTTX
| TTX Company | 1 |
MP
| Missouri Pacific | 2 |
MTTX
| TTX Company | 1 |
NP
| Northern Pacific | 1 |
PTTX
| TTX Company | 8 |
QTTX
| TTX Company | 1 |
QUAX
| Redstreak, LLC | 2 |
RBBX
| Ringling Bros. and Barnum and Bailey | 1 |
RTTX
| TTX Company | 2 |
SP
| Southern Pacific | 7 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 2 |
WP
| Western Pacific | 1 |