AOK
| Arkansas-Oklahoma Railroad | 1 |
APTX
| Air Products and Chemicals Incorporated | 30 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BNSF
| BNSF Railway | 9 |
CSX
| CSX Railroad | 4 |
DODX
| Department Of Defense | 10 |
ECXX
| East Carbon Development Company | 1 |
EJE
| Elgin Joliet and Eastern | 1 |
FEC
| Florida East Coast | 11 |
HTTX
| TTX Company | 3 |
IC
| Illinois Central | 1 |
ITTX
| TTX Company | 13 |
JESX
| James E Strates Shows | 1 |
KRL
| Kasgro Rail Lines | 5 |
ME
| Morristown & Erie Railroad | 1 |
MTTX
| TTX Company | 3 |
MVCX
| MVCX | 1 |
NS
| Norfolk Southern | 2 |
NWSX
| NEW YORK RAIL LOGISTICS LLC | 1 |
NYC
| New York Central | 13 |
OTTX
| TTX Company | 6 |
PC
| Penn Central | 1 |
PTTX
| TTX Company | 10 |
QTTX
| TTX Company | 11 |
QUAX
| Redstreak, LLC | 4 |
RBBX
| Ringling Bros. and Barnum and Bailey | 3 |
RDG
| Reading Railroad | 1 |
SP
| Southern Pacific | 3 |
TBCX
| Boeing Company | 2 |
TTDX
| TTX Company - DOD Service Flats | 1 |
TTX
| TTX Company | 2 |
USWX
| USA Waste Services Incorporated | 4 |
XTTX
| TTX Company | 4 |