ACRR
| ACRR | 3 |
ACWR
| Aberdeen, Carolina & Western | 1 |
ALLN
| Allentown and Auburn Railroad | 1 |
AMTK
| Amtrak | 43 |
ARR
| Alaska Railroad | 6 |
BCVX
| West Coast Express | 2 |
BO
| Baltimore & Ohio | 2 |
BRW
| Black River And Western | 5 |
CBQ
| Chicago Burlington & Quincy | 3 |
CDOT
| Conneticut Department of Transportation | 1 |
CNJ
| Central Rail Road of New Jersey | 2 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 4 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CRR
| Clinchfield | 7 |
CSRX
| Conway Scenic Railroad | 3 |
CSX
| CSX Railroad | 4 |
CTVX
| Cleveland Terminal and Valley Railway Incorporated | 2 |
CVSR
| Cuyahoga Valley Scenic RR | 9 |
DLW
| Delaware Lackawanna & Western | 2 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
DRMX
| Danbury Railway Museum Incorporated | 1 |
EBT
| East Broad Top | 9 |
EV
| Everett Railroad | 7 |
GCRY
| Grand Canyon Railway | 19 |
GTLX
| Great Lakes Railcar, Inc. | 1 |
HALX
| Holland American Line - Westours Incorporated | 10 |
HRS
| Holidaysburg and Roaring Spring Railroad Company | 3 |
HVRX
| Heber Valley Historic Railroad | 3 |
KPRY
| KPRY | 3 |
LAL
| Livonia Avon & Lakeville | 3 |
LGSR
| LGSR | 6 |
LKP
| LKP | 1 |
LKPR
| LKPR | 3 |
LNER
| London North Eastern Railway | 1 |
MARC
| Maryland Transit Administration | 3 |
MBTA
| Massachusetts Bay Transit Authority | 2 |
ME
| Morristown & Erie Railroad | 6 |
METX
| METRA | 1 |
MIDH
| Middletown and Hummelstown RR Company | 3 |
MILW
| Milwaukee Road | 1 |
MKT
| Missouri-Kansas-Texas | 5 |
MNCR
| Metro North Commuter Railway | 1 |
MPA
| Maryland and Pennsylvania Railroad | 3 |
MRLX
| Mid America Rail Car Leasing | 1 |
NCRR
| NCRR | 5 |
NCTM
| NCTM | 1 |
NHI
| NHI | 10 |
NHIR
| New Hope & Ivyland | 6 |
NHRR
| New Hope and Ivyland Rail Road | 7 |
NJT
| New Jersey Transit | 46 |
NRHX
| National Railway Historical Society | 2 |
NRTX
| Nashville Music City Star | 1 |
NS
| Norfolk Southern | 6 |
NSHR
| North Shore | 11 |
NSRM
| NSRM | 2 |
NSRX
| Railroading Heritage Of Midwest America | 1 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 14 |
NYGL
| New York and Greenwood Lake Railroad | 1 |
NYSW
| New York Susquehanna & Western | 1 |
PC
| Penn Central | 1 |
PPCX
| AAPRCO Register Private Cars | 33 |
PPLX
| Pennsylvania Power and Light Company | 1 |
PR
| Palmetto Railways | 3 |
PRR
| Pennsylvania Railroad | 46 |
PRSL
| Pennsylvania Reading Seashore | 1 |
PRWX
| Railway Entertainment Services Inc. | 4 |
PULL
| Pullman | 3 |
RBBX
| Ringling Bros. and Barnum and Bailey | 11 |
RBMN
| Reading Blue Mountain & Northern | 301 |
RCTH
| RCTH | 1 |
RDG
| Reading Railroad | 47 |
RI
| RI | 1 |
RNCX
| North Carolina Dept Of Transportation | 19 |
RNRR
| RNRR | 1 |
RPCX
| Railroad Passenger Car Numbering Bureau | 16 |
RXCX
| RXCX | 1 |
SBRR
| Stourbridge Railroad Company | 1 |
SLRG
| San Luis and Rio Grande Railroad | 5 |
SLSF
| Saint Louis-San Francisco | 1 |
SPAX
| Southeastern Pennsylvania Transportation (SEPTA) | 3 |
SRC
| Strasburg Railroad | 6 |
STRT
| Stewartstown Railroad Company | 1 |
SUEX
| SUEX | 1 |
TCRX
| Tennessee Central Railway Musem | 14 |
THSX
| New York, Susquehanna & Western Rwy. | 2 |
TIOC
| Tioga Central | 1 |
UP
| Union Pacific Railroad Company | 4 |
URHS
| URHS | 2 |
USA
| USA | 2 |
UTAX
| Utah Frontrunner | 1 |
VIRC
| VIRC | 1 |
VRIC
| Virginia Rail Investment | 2 |
WCRL
| West Chester Railroad Company | 11 |
WEBX
| WEBX | 2 |
WKS
| WKS | 1 |
WM
| Western Maryland | 1 |
WPYR
| White Pass & Yukon Route | 14 |
WRM
| WRM | 1 |
WSRR
| WSRR | 5 |
WW
| Winchester & Western | 1 |