ABOX
| TTX Company | 1 |
AGR
| Alabama and Gulf Coast | 1 |
AKMD
| Arkansas Midland Railroad Company | 1 |
ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
ANR
| Angelina and Neches River Railroad | 4 |
AOK
| Arkansas-Oklahoma Railroad | 8 |
APA
| Apache Railway Company | 1 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
ATW
| Atlantic and Western | 10 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 11 |
BNSF
| BNSF Railway | 82 |
CHTT
| Chicago Heights Terminal Transfer | 2 |
CLC
| Columbia and Cowlitz Railway Company | 2 |
CN
| Canadian National Railways | 2 |
CNA
| Canadian National Railways | 7 |
CNIS
| Canadian National Railways | 5 |
CNW
| Chicago & Northwestern | 10 |
CP
| Canadian Pacific Railway | 18 |
CPAA
| Canadian Pacific Railway | 8 |
CR
| Conrail | 7 |
CRLE
| Coe Rail Incorporated | 2 |
CSX
| CSX Railroad | 48 |
CVC
| Canadian National Railways | 2 |
DME
| Dakota, Minnesota and Eastern | 2 |
DRGW
| Denver & Rio Grande Western | 2 |
DWC
| Canadian National Railways | 3 |
EEC
| East Erie Commercial Railroad | 6 |
FBOX
| TTX Company | 13 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FSRR
| FerroSur | 6 |
FXE
| Ferromex | 8 |
GMRC
| Green Mountain RR | 1 |
GMSR
| Kansas City Southern | 2 |
GTRA
| Golden Triangle Railroad | 1 |
GTW
| Grand Trunk Western | 11 |
GVSR
| Galveston Railroad L.P. | 10 |
HLMX
| Helm Financial Corporation | 3 |
HS
| H and S Railroad Company | 13 |
IBT
| International Bridge and Terminal Company | 4 |
IC
| Illinois Central | 5 |
KCS
| Kansas City Southern | 27 |
KRR
| Kiamichi | 1 |
KYLE
| Kyle Railroad | 1 |
LNAC
| Chattahoochee Bay Railroad, LLC | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MB
| Meridian & Bigbee | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 2 |
MEC
| Maine Central | 1 |
MKT
| Missouri-Kansas-Texas | 1 |
MMA
| Montreal, Maine & Atlantic | 2 |
MNNR
| Minnesota Commercial | 1 |
MP
| Missouri Pacific | 13 |
MRL
| Montana Rail Link | 4 |
MWCX
| Midwest Railcar Corporation | 3 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 5 |
NOKL
| Northwestern Oklahoma | 2 |
NOPB
| New Orleans Public Belt Railroad | 6 |
NS
| Norfolk Southern | 41 |
NSHR
| North Shore | 2 |
NW
| Norfolk & Western | 3 |
NYC
| New York Central | 9 |
PLTX
| Potlatch Corporation | 1 |
RBOX
| Railbox Company | 7 |
RGCX
| Rio Grande Chemical LTD | 2 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
SLGG
| Progress Rail Services Corporation | 2 |
SLSF
| Saint Louis-San Francisco | 1 |
SOO
| Soo Line | 2 |
SOU
| Southern | 30 |
SP
| Southern Pacific | 18 |
SRN
| Sabine River & Northern | 9 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 5 |
STE
| Stockton Terminal and Eastern RR | 1 |
TBOX
| TTX Company | 26 |
TFM
| Kansas City Southern De Mexico | 2 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 10 |
UPP
| Union Pacific Passenger | 1 |
VCY
| Galveston Railroad, L.P. | 1 |
WC
| Wisconsin Central | 13 |
WCCL
| Wisconsin Central | 14 |
WCOR
| Wellsboro and Corning Railroad Company | 1 |
WE
| Wheeling & Lake Erie | 3 |
WLO
| Waterloo Railway Company (Illinois Central) | 2 |
WP
| Western Pacific | 2 |
WSOR
| Wisconsin & Southern | 11 |
YARR
| Youngstown and Austintown Railroad | 1 |