AOK
| Arkansas-Oklahoma Railroad | 9 |
ATSF
| Atchison Topeka & Santa Fe | 3 |
ATTX
| TTX Company - Container Flats | 3 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 14 |
CN
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 16 |
DODX
| Department Of Defense | 43 |
DRGW
| Denver & Rio Grande Western | 1 |
ECXX
| East Carbon Development Company | 2 |
EJE
| Elgin Joliet and Eastern | 2 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 3 |
FEC
| Florida East Coast | 2 |
FTTX
| TTX Company | 13 |
HS
| H and S Railroad Company | 2 |
HTTX
| TTX Company | 11 |
IC
| Illinois Central | 2 |
ITTX
| TTX Company | 6 |
JTTX
| TTX Company | 1 |
KCS
| Kansas City Southern | 1 |
KRL
| Kasgro Rail Lines | 20 |
KTTX
| TTX Company | 1 |
LMIC
| Lake Michigan & Indiana Railroad | 1 |
MP
| Missouri Pacific | 11 |
MTTX
| TTX Company | 1 |
NS
| Norfolk Southern | 6 |
NW
| Norfolk & Western | 2 |
OTTX
| TTX Company | 6 |
PTDX
| ABB Power T and D Company Incorporated | 1 |
PTTX
| TTX Company | 24 |
QTTX
| TTX Company | 14 |
QUAX
| Redstreak, LLC | 1 |
RBBX
| Ringling Bros. and Barnum and Bailey | 23 |
RTTX
| TTX Company | 17 |
SOO
| Soo Line | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 12 |
SPMW
| Southern Pacific Maintenance of Way | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TFM
| Kansas City Southern De Mexico | 1 |
TTCX
| TTX Company | 3 |
TTDX
| TTX Company - DOD Service Flats | 3 |
TTEX
| TTX Company - Articulated Flat Cars (TOFC/COFC) | 8 |
TTHX
| TTX Company - Flat Cars | 4 |
UP
| Union Pacific Railroad Company | 49 |
UPCX
| Clean Harbors Environmental Sciences, Inc. | 3 |
VTTX
| TTX Company | 3 |
WTTX
| TTX Company | 1 |
XTTX
| TTX Company | 2 |