ABOX
| TTX Company | 5 |
ADN
| Ashley Drew & Northern | 2 |
AG
| Galveston Railroad L.P. | 1 |
AGR
| Alabama and Gulf Coast | 2 |
AKMD
| Arkansas Midland Railroad Company | 1 |
ALAB
| Alabama Railroad | 2 |
AM
| Arkansas & Missouri | 1 |
AMTK
| Amtrak | 19 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ASAB
| Bay Line Railroad LLC | 2 |
ATSF
| Atchison Topeka & Santa Fe | 7 |
ATW
| Atlantic and Western | 4 |
BAR
| Bangor & Aroostook | 1 |
BAYL
| Bay Line, LLC | 2 |
BB
| Buckingham Branch | 1 |
BN
| Burlington Northern | 10 |
BNSF
| BNSF Railway | 2 |
CHTT
| Chicago Heights Terminal Transfer | 2 |
CN
| Canadian National Railways | 2 |
CNA
| Canadian National Railways | 4 |
CNIS
| Canadian National Railways | 3 |
CNW
| Chicago & Northwestern | 8 |
CO
| Chesapeake & Ohio | 2 |
CPAA
| Canadian Pacific Railway | 1 |
CR
| Conrail | 14 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 24 |
CUOH
| Columbus and Ohio River Railroad Company | 5 |
CVC
| Canadian National Railways | 1 |
DJTX
| Joseph Transportation Incorporated | 1 |
DME
| Dakota, Minnesota and Eastern | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
DTI
| Detroit Toledo & Ironton | 1 |
EEC
| East Erie Commercial Railroad | 2 |
FURX
| First Union Rail | 1 |
GMRC
| Green Mountain RR | 4 |
GNRR
| Georgia Northeastern | 1 |
GTW
| Grand Trunk Western | 6 |
GVSR
| Galveston Railroad L.P. | 6 |
HS
| H and S Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 8 |
IC
| Illinois Central | 2 |
KCS
| Kansas City Southern | 4 |
KECR
| KECR | 1 |
KELX
| Kellogg Company | 1 |
KWT
| KWT Railway | 2 |
LNAC
| Chattahoochee Bay Railroad, LLC | 1 |
LRWN
| Little Rock & Western | 1 |
LW
| Louisville and Wadley Railway Company | 3 |
MEC
| Maine Central | 1 |
MET
| Modesto and Empire Traction Company | 1 |
MILW
| Milwaukee Road | 2 |
MNNR
| Minnesota Commercial | 1 |
MP
| Missouri Pacific | 17 |
MRL
| Montana Rail Link | 5 |
MRS
| Manufacturers Railway | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
NOKL
| Northwestern Oklahoma | 4 |
NS
| Norfolk Southern | 15 |
NW
| Norfolk & Western | 6 |
NYC
| New York Central | 4 |
OAR
| Old Augusta Railroad | 2 |
OMSX
| J. T. Leasing, Inc. d/b/a Ohio Mulch | 1 |
ONT
| Ontario Northland Railway | 1 |
QGRY
| Quebec Gatineau Railway Incorporated | 1 |
RBOX
| Railbox Company | 9 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
SCL
| Seaboard Coast Line | 6 |
SLC
| San Luis Central Railroad Company | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SLR
| St Lawrence & Atlantic | 2 |
SLSF
| Saint Louis-San Francisco | 6 |
SM
| St. Marys Railroad | 1 |
SOO
| Soo Line | 2 |
SOU
| Southern | 23 |
SP
| Southern Pacific | 14 |
SRN
| Sabine River & Northern | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
SVRR
| Shamokin Valley Railroad Company | 1 |
TASD
| Terminal Alabama State Docks | 1 |
TBOX
| TTX Company | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 1 |
TSRD
| Twin State Railroad Company | 1 |
UP
| Union Pacific Railroad Company | 12 |
WC
| Wisconsin Central | 2 |
WCCL
| Wisconsin Central | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 2 |
WP
| Western Pacific | 4 |
WSOR
| Wisconsin & Southern | 3 |
YB
| Youngstown Belt Railroad Company | 3 |
YKR
| York Rail | 1 |