AOK
| Arkansas-Oklahoma Railroad | 8 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
BAWX
| Babcox & Wilcox | 1 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 7 |
BNSF
| BNSF Railway | 22 |
CN
| Canadian National Railways | 2 |
CNW
| Chicago & Northwestern | 3 |
CP
| Canadian Pacific Railway | 5 |
CR
| Conrail | 1 |
CSS
| Chicago South Shore And South Bend | 1 |
CSX
| CSX Railroad | 1 |
DME
| Dakota, Minnesota and Eastern | 1 |
DODX
| Department Of Defense | 12 |
DRGW
| Denver & Rio Grande Western | 4 |
FTTX
| TTX Company | 3 |
GN
| Great Northern | 1 |
HMTX
| HMTX | 1 |
HTTX
| TTX Company | 95 |
IC
| Illinois Central | 4 |
ICE
| Iowa Chicago and Eastern | 4 |
ITTX
| TTX Company | 4 |
KCS
| Kansas City Southern | 10 |
KRL
| Kasgro Rail Lines | 10 |
MP
| Missouri Pacific | 51 |
MRL
| Montana Rail Link | 2 |
MSTL
| Minneapolis & St Louis | 1 |
MTTX
| TTX Company | 1 |
NS
| Norfolk Southern | 1 |
OTTX
| TTX Company | 21 |
PEYX
| Transportation Technology Services Inc | 1 |
PGR
| Progressive Rail, Inc | 1 |
PPU
| Tazewell & Peoria Railroad | 13 |
PTTX
| TTX Company | 12 |
QTTX
| TTX Company | 8 |
QUAX
| Redstreak, LLC | 2 |
RNDX
| American Railcar Leasing, LLC | 1 |
SLSF
| Saint Louis-San Francisco | 2 |
SP
| Southern Pacific | 2 |
SPMW
| Southern Pacific Maintenance of Way | 4 |
SPSX
| Progress Rail Services Corp | 1 |
TBCX
| Boeing Company | 8 |
TTHX
| TTX Company - Flat Cars | 18 |
TTMX
| TTX Company | 4 |
TTX
| TTX Company | 3 |
TZPR
| Tazewell & Peoria Railroad | 3 |
UP
| Union Pacific Railroad Company | 11 |
UPCX
| Clean Harbors Environmental Sciences, Inc. | 2 |
UPP
| Union Pacific Passenger | 1 |
WP
| Western Pacific | 1 |
XTTX
| TTX Company | 1 |