ADIX
| Adirondack Railway Preservation Society | 10 |
AFRX
| AF Railway Industries Incorporated | 2 |
ALLN
| Allentown and Auburn Railroad | 3 |
AMTK
| Amtrak | 122 |
AMTL
| Agence métropolitaine de transport | 1 |
AOE
| American Orient Express | 1 |
AT
| Auto Train | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BDRV
| Belvidere & Delaware Railroad | 5 |
BM
| Boston & Maine | 1 |
BO
| Baltimore & Ohio | 14 |
BOMX
| B&O Railroad Museum Inc. | 4 |
BRW
| Black River And Western | 16 |
BSOR
| Buffalo Southern | 8 |
BUDX
| Budd Company (temporary) | 1 |
CACX
| Cooperstown & Charlotte Valley Railroad | 3 |
CBQ
| Chicago Burlington & Quincy | 3 |
CDOT
| Conneticut Department of Transportation | 18 |
CFRC
| CFRC | 3 |
CMRR
| Catskill Mountain Scenic | 16 |
CMSL
| Cape May Seashore Line | 1 |
CNJ
| Central Rail Road of New Jersey | 30 |
CO
| Chesapeake & Ohio | 7 |
CSX
| CSX Railroad | 23 |
CVSR
| Cuyahoga Valley Scenic RR | 9 |
DH
| Delaware & Hudson | 3 |
DL
| Delaware-Lackawanna Railroad Company | 1 |
DLW
| Delaware Lackawanna & Western | 3 |
DOTX
| USDOT/Federal Railroad Administration | 6 |
DRMX
| Danbury Railway Museum Incorporated | 4 |
DSRX
| Downeast Scenic | 5 |
EBGR
| Eastern Berks Gateway Railroad | 4 |
EBT
| East Broad Top | 2 |
EL
| Erie Lackawanna | 15 |
ENEX
| ENEX | 1 |
EV
| Everett Railroad | 1 |
GMO
| Gulf Mobile & Ohio | 8 |
GMRC
| Green Mountain RR | 4 |
GMRx
| GMRX | 1 |
GO
| Gulf and Ohio | 1 |
GTW
| Grand Trunk Western | 1 |
HZGX
| Herzog Contracting Corporation | 1 |
IDTX
| IDTX | 7 |
JESX
| James E Strates Shows | 8 |
LGSR
| LGSR | 1 |
LI
| Long Island Rail Road Company | 154 |
MARC
| Maryland Transit Administration | 25 |
MBTA
| Massachusetts Bay Transit Authority | 6 |
MC
| Mass Coastal | 2 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 11 |
ME
| Morristown & Erie Railroad | 12 |
MIDH
| Middletown and Hummelstown RR Company | 1 |
MNCR
| Metro North Commuter Railway | 13 |
MNCW
| Metro-North Commuter Railroad | 3 |
NH
| New Haven | 2 |
NHIR
| New Hope & Ivyland | 26 |
NHRR
| New Hope and Ivyland Rail Road | 24 |
NJT
| New Jersey Transit | 99 |
NRHX
| National Railway Historical Society | 1 |
NS
| Norfolk Southern | 8 |
NSHR
| North Shore | 1 |
NSRX
| Railroading Heritage Of Midwest America | 3 |
NYC
| New York Central | 22 |
NYGL
| New York and Greenwood Lake Railroad | 3 |
NYLE
| New York and Lake Erie Railroad Company | 3 |
NYSW
| New York Susquehanna & Western | 3 |
OCTL
| Oil Creek and Titusville Lines | 7 |
PC
| Penn Central | 5 |
PPCX
| AAPRCO Register Private Cars | 20 |
PRR
| Pennsylvania Railroad | 36 |
PRSL
| Pennsylvania Reading Seashore | 6 |
PRWX
| Railway Entertainment Services Inc. | 1 |
PULL
| Pullman | 1 |
RBBX
| Ringling Bros. and Barnum and Bailey | 15 |
RBMN
| Reading Blue Mountain & Northern | 24 |
RCPX
| Railcar Limited | 1 |
RDG
| Reading Railroad | 23 |
RI
| RI | 2 |
RPCX
| Railroad Passenger Car Numbering Bureau | 13 |
RRBX
| Rampart Range Corporation | 1 |
RTA
| Regional Transportation Authority | 1 |
RTI
| Rail Tours | 1 |
SEMT
| SEMT | 1 |
SIIX
| SIIX | 4 |
SLRG
| San Luis and Rio Grande Railroad | 2 |
SLRS
| SMS Rail Service Incorporated | 32 |
SNC
| Saratoga & North Creek Railway | 3 |
SPAX
| Southeastern Pennsylvania Transportation (SEPTA) | 17 |
SRC
| Strasburg Railroad | 18 |
ST
| Springfield Terminal | 1 |
SUEX
| SUEX | 2 |
THSX
| New York, Susquehanna & Western Rwy. | 6 |
TIOC
| Tioga Central | 8 |
TRCX
| Florida Tri-Rail | 4 |
UPP
| Union Pacific Passenger | 8 |
VALE
| Valley Railroad Company | 8 |
VRE
| Virginia Railway Express | 3 |
VRIC
| Virginia Rail Investment | 4 |
WCRL
| West Chester Railroad Company | 22 |
WEBX
| WEBX | 1 |
WWRC
| Wilmington and Western Railroad | 2 |