AOK
| Arkansas-Oklahoma Railroad | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 2 |
CNIS
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 3 |
CSS
| Chicago South Shore And South Bend | 1 |
CSX
| CSX Railroad | 2 |
CWI
| Chicago and Western Indiana | 2 |
DODX
| Department Of Defense | 3 |
ELKX
| Elkem Metals Company | 1 |
FEC
| Florida East Coast | 1 |
FTSX
| Fairmont Tamper | 1 |
HTTX
| TTX Company | 1 |
IRYM
| Illinois Railway Museum | 3 |
ITTX
| TTX Company | 2 |
JTTX
| TTX Company | 3 |
KCS
| Kansas City Southern | 1 |
KRL
| Kasgro Rail Lines | 3 |
LMIC
| Lake Michigan & Indiana Railroad | 1 |
LTTX
| TTX Company | 1 |
MAMX
| Mammoet USA, Inc | 1 |
METX
| METRA | 1 |
MKT
| Missouri-Kansas-Texas | 1 |
MP
| Missouri Pacific | 3 |
MPA
| Maryland and Pennsylvania Railroad | 1 |
MTTX
| TTX Company | 3 |
OTTX
| TTX Company | 3 |
PRR
| Pennsylvania Railroad | 3 |
PTTX
| TTX Company | 1 |
QTTX
| TTX Company | 6 |
QUAX
| Redstreak, LLC | 2 |
SOO
| Soo Line | 1 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 2 |
TBCX
| Boeing Company | 1 |
TTEX
| TTX Company - Articulated Flat Cars (TOFC/COFC) | 1 |
TTHX
| TTX Company - Flat Cars | 1 |
TTOX
| TTX Company | 1 |
TTX
| TTX Company | 1 |
UP
| Union Pacific Railroad Company | 3 |
XTTX
| TTX Company | 2 |