ABS
| Alabama Southern Railroad | 1 |
AERC
| Albany and Eastern Railroad Company | 2 |
AMTK
| Amtrak | 2 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
APTX
| Air Products and Chemicals Incorporated | 12 |
ATTX
| TTX Company - Container Flats | 1 |
ATW
| Atlantic and Western | 4 |
AWXX
| East Carbon development Company | 6 |
BNSF
| BNSF Railway | 1 |
BTCX
| Browner Turnout Company | 1 |
BVRY
| Brandywine Valley Railroad Company | 9 |
CN
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 13 |
CR
| Conrail | 2 |
CSX
| CSX Railroad | 3 |
DL
| Delaware-Lackawanna Railroad Company | 1 |
DODX
| Department Of Defense | 41 |
ECXX
| East Carbon Development Company | 1 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FEC
| Florida East Coast | 29 |
FTSX
| Fairmont Tamper | 5 |
FURX
| First Union Rail | 1 |
GIMX
| General American Marks Company | 18 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
HPAX
| International Paper Company | 1 |
HS
| H and S Railroad Company | 3 |
HTTX
| TTX Company | 14 |
ITTX
| TTX Company | 28 |
JESX
| James E Strates Shows | 46 |
JTSX
| Joseph Transportation Incorporated | 1 |
JTTX
| TTX Company | 9 |
KRL
| Kasgro Rail Lines | 1 |
LBR
| Lowville and Beaver River Railroad Compa | 4 |
LHFX
| Lehigh Heavy Forge Corporation | 6 |
MP
| Missouri Pacific | 1 |
MTTX
| TTX Company | 32 |
NJRC
| New Jersey Rail Carrier LLC | 5 |
NS
| Norfolk Southern | 19 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 2 |
OTTX
| TTX Company | 9 |
PRR
| Pennsylvania Railroad | 1 |
PTTX
| TTX Company | 49 |
QTTX
| TTX Company | 11 |
RBBX
| Ringling Bros. and Barnum and Bailey | 20 |
RBMN
| Reading Blue Mountain & Northern | 1 |
RCTH
| RCTH | 1 |
RDG
| Reading Railroad | 3 |
RTTX
| TTX Company | 49 |
SNHX
| IND/AG Chemicals Incorporated | 1 |
SOO
| Soo Line | 3 |
SOU
| Southern | 30 |
SPMW
| Southern Pacific Maintenance of Way | 1 |
TFM
| Kansas City Southern De Mexico | 1 |
TPDX
| TPDX | 3 |
TTDX
| TTX Company - DOD Service Flats | 2 |
TTEX
| TTX Company - Articulated Flat Cars (TOFC/COFC) | 39 |
TTHX
| TTX Company - Flat Cars | 2 |
TTJX
| TTX Company-Bulkhead Flats | 12 |
TTX
| TTX Company | 1 |
UMP
| Upper Merion and Plymouth Railroad | 1 |
UP
| Union Pacific Railroad Company | 1 |
UPCX
| Clean Harbors Environmental Sciences, Inc. | 1 |
USWX
| USA Waste Services Incorporated | 3 |
VTTX
| TTX Company | 1 |
WPRR
| Willamette and Pacific | 3 |
XTTX
| TTX Company | 5 |
YARR
| Youngstown and Austintown Railroad | 2 |