AOK
| Arkansas-Oklahoma Railroad | 1 |
BLHX
| SMBC RAIL SERVICES LLC | 1 |
BNSF
| BNSF Railway | 2 |
BTCX
| Browner Turnout Company | 1 |
CSX
| CSX Railroad | 6 |
CTA
| Chicago Transit Authority | 4 |
DODX
| Department Of Defense | 18 |
FEC
| Florida East Coast | 70 |
FURX
| First Union Rail | 1 |
HTTX
| TTX Company | 2 |
IARX
| IARX | 1 |
ITTX
| TTX Company | 2 |
KCS
| Kansas City Southern | 1 |
KRL
| Kasgro Rail Lines | 1 |
LBFX
| L B Foster Co | 1 |
LMIC
| Lake Michigan & Indiana Railroad | 2 |
LTTX
| TTX Company | 3 |
MEC
| Maine Central | 1 |
METX
| METRA | 2 |
OTTX
| TTX Company | 8 |
PHMX
| P&H Mining Equipment | 4 |
PRSX
| Progress Rail Service | 1 |
PTTX
| TTX Company | 13 |
RBBX
| Ringling Bros. and Barnum and Bailey | 21 |
RTTX
| TTX Company | 2 |
SOU
| Southern | 1 |
SPSX
| Progress Rail Services Corp | 4 |
TBCX
| Boeing Company | 3 |
TPDX
| TPDX | 25 |
TPOX
| TPOX | 7 |
TTEX
| TTX Company - Articulated Flat Cars (TOFC/COFC) | 15 |
TTXX
| TTX Company | 2 |
UP
| Union Pacific Railroad Company | 4 |
XTTX
| TTX Company | 4 |