ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
AM
| Arkansas & Missouri | 1 |
AMC
| Arkansas Louisiana and Mississippi Railr | 1 |
ASAB
| Bay Line Railroad LLC | 1 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
ATW
| Atlantic and Western | 9 |
BAR
| Bangor & Aroostook | 7 |
BB
| Buckingham Branch | 1 |
BCIT
| Canadian National Railways | 5 |
BCIY
| BCIY | 1 |
BCOL
| Canadian National Railways | 18 |
BKTY
| Union Pacific Railroad Company | 1 |
BN
| Burlington Northern | 5 |
BO
| Baltimore & Ohio | 3 |
CCR
| Corinth & Counce | 3 |
CHTT
| Chicago Heights Terminal Transfer | 5 |
CIRR
| Chattahoochee Industrial Railroad | 6 |
CLC
| Columbia and Cowlitz Railway Company | 6 |
CN
| Canadian National Railways | 20 |
CNA
| Canadian National Railways | 12 |
CO
| Chesapeake & Ohio | 3 |
COER
| Crab Orchard & Egyptian | 1 |
COP
| City of Prineville Railway | 1 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 5 |
CRLE
| Coe Rail Incorporated | 12 |
CSX
| CSX Railroad | 41 |
CV
| Central Vermont | 3 |
CVC
| Canadian National Railways | 2 |
DGHX
| Searles Valley Minerals Operations, Inc. | 1 |
DM
| Detroit & Mackinac | 4 |
DRGW
| Denver & Rio Grande Western | 15 |
DWC
| Canadian National Railways | 2 |
EACH
| East Camden and Highland | 1 |
EEC
| East Erie Commercial Railroad | 5 |
ELS
| Escanaba and Lake Superior Railroad Comp | 3 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FCRD
| First Coast Railway | 2 |
FGER
| Fruit Growers Express Company | 3 |
FRVR
| Fox River Valley Railroad | 3 |
FSRR
| FerroSur | 2 |
FXE
| Ferromex | 23 |
GBW
| Green Bay & Western | 6 |
GMSR
| Kansas City Southern | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
GTW
| Grand Trunk Western | 5 |
GVSR
| Galveston Railroad L.P. | 9 |
HLMX
| Helm Financial Corporation | 1 |
HPJX
| Helm-Pacific Leasing | 1 |
HS
| H and S Railroad Company | 7 |
IBT
| International Bridge and Terminal Company | 1 |
IC
| Illinois Central | 3 |
ICG
| Illinois Central Gulf | 4 |
IHRC
| Indiana Hi Rail | 1 |
KELX
| Kellogg Company | 1 |
LF
| LF | 2 |
LPN
| Longview, Portland & Northern | 2 |
LRWN
| Little Rock & Western | 1 |
MB
| Meridian & Bigbee | 2 |
MILW
| Milwaukee Road | 3 |
MKT
| Missouri-Kansas-Texas | 1 |
MP
| Missouri Pacific | 45 |
MPA
| Maryland and Pennsylvania Railroad | 1 |
MRL
| Montana Rail Link | 1 |
MRS
| Manufacturers Railway | 1 |
MSDR
| Knoxville & Holston River Railroad | 1 |
MSRC
| Kansas City Southern | 1 |
MSTL
| Minneapolis & St Louis | 1 |
MTW
| Marinette Tomahawk & Western | 4 |
NAR
| Northern Alberta Railways | 5 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 6 |
NW
| Norfolk & Western | 3 |
NWP
| Northwestern Pacific Railroad Company | 1 |
OCE
| Oregon California & Eastern | 2 |
OLYR
| Olympic Railroad Company | 1 |
ONT
| Ontario Northland Railway | 1 |
QOCX
| Quaker Oats Company | 2 |
RBOX
| Railbox Company | 9 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
SAN
| Sandersville | 2 |
SCL
| Seaboard Coast Line | 3 |
SLSF
| Saint Louis-San Francisco | 1 |
SOO
| Soo Line | 2 |
SOU
| Southern | 7 |
SP
| Southern Pacific | 47 |
SRN
| Sabine River & Northern | 7 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 29 |
STE
| Stockton Terminal and Eastern RR | 1 |
SWGR
| Seagraves Whiteface and Lubbock Railroad | 1 |
TBOX
| TTX Company | 1 |
TCAX
| General Electric Rail Services | 1 |
TM
| Texas-Mexican | 1 |
TSE
| Texas South-Eastern Railroad Company | 2 |
UP
| Union Pacific Railroad Company | 11 |
USAX
| United States Army | 1 |
USN
| United States Navy | 3 |
VCY
| Galveston Railroad, L.P. | 13 |
WC
| Wisconsin Central | 2 |
WCRC
| Washington Central | 3 |
WLO
| Waterloo Railway Company (Illinois Central) | 8 |
WP
| Western Pacific | 30 |