ABOX
| TTX Company | 2 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
ATW
| Atlantic and Western | 1 |
BAEX
| Andersons | 1 |
BCOL
| Canadian National Railways | 2 |
BKTY
| Union Pacific Railroad Company | 4 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 5 |
BO
| Baltimore & Ohio | 3 |
CCR
| Corinth & Counce | 1 |
CMHX
| CarMath Incorporated | 1 |
CN
| Canadian National Railways | 4 |
CNA
| Canadian National Railways | 7 |
CNIS
| Canadian National Railways | 2 |
CNJ
| Central Rail Road of New Jersey | 2 |
CNW
| Chicago & Northwestern | 5 |
CP
| Canadian Pacific Railway | 5 |
CPAA
| Canadian Pacific Railway | 2 |
CR
| Conrail | 12 |
CSX
| CSX Railroad | 3 |
CV
| Central Vermont | 3 |
DH
| Delaware & Hudson | 6 |
DODX
| Department Of Defense | 3 |
DUPX
| Du Pont De Nemours and Company Incorporated | 1 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 4 |
FBOX
| TTX Company | 3 |
GNBC
| Grainbelt Corporation | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
GTRA
| Golden Triangle Railroad | 1 |
GTW
| Grand Trunk Western | 2 |
HPJX
| Helm-Pacific Leasing | 2 |
HS
| H and S Railroad Company | 6 |
IBT
| International Bridge and Terminal Company | 5 |
KCS
| Kansas City Southern | 12 |
LV
| Lehigh Valley | 2 |
LVRC
| Lamoille Valley | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MEC
| Maine Central | 6 |
MP
| Missouri Pacific | 1 |
MPA
| Maryland and Pennsylvania Railroad | 6 |
MWCX
| Midwest Railcar Corporation | 2 |
NDYX
| First Union Rail | 2 |
NHIR
| New Hope & Ivyland | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 19 |
NSHR
| North Shore | 1 |
NW
| Norfolk & Western | 3 |
NYC
| New York Central | 2 |
PC
| Penn Central | 3 |
PRR
| Pennsylvania Railroad | 11 |
RBOX
| Railbox Company | 5 |
RDG
| Reading Railroad | 2 |
RUT
| Vermont Railway Incorporated | 4 |
SGVY
| Saginaw Valley Railway Company Incorpora | 3 |
SIRX
| Southern Illinois Railcar Company | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SOU
| Southern | 26 |
SP
| Southern Pacific | 4 |
SRN
| Sabine River & Northern | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TBOX
| TTX Company | 6 |
TFM
| Kansas City Southern De Mexico | 1 |
TR
| Tomahawk Railway L.P. | 3 |
UP
| Union Pacific Railroad Company | 4 |
USN
| United States Navy | 1 |
WCRL
| West Chester Railroad Company | 3 |
WM
| Western Maryland | 7 |
WP
| Western Pacific | 1 |
YARR
| Youngstown and Austintown Railroad | 2 |