ABEX
| Advanced BioEnergy | 1 |
ADN
| Ashley Drew & Northern | 1 |
AERC
| Albany and Eastern Railroad Company | 1 |
AGR
| Alabama and Gulf Coast | 1 |
AKMD
| Arkansas Midland Railroad Company | 3 |
ALAB
| Alabama Railroad | 9 |
ALM
| Arkansas Louisiana and Mississippi Railr | 2 |
AM
| Arkansas & Missouri | 1 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 18 |
ATW
| Atlantic and Western | 9 |
BAEX
| Andersons | 1 |
BAR
| Bangor & Aroostook | 1 |
BCOL
| Canadian National Railways | 3 |
BKTY
| Union Pacific Railroad Company | 1 |
BN
| Burlington Northern | 10 |
BNSF
| BNSF Railway | 34 |
BR
| Buffalo and Pittsburgh | 2 |
CBQ
| Chicago Burlington & Quincy | 2 |
CCR
| Corinth & Counce | 1 |
CHTT
| Chicago Heights Terminal Transfer | 4 |
CIC
| Cedar Rapids & Iowa City | 1 |
CIRR
| Chattahoochee Industrial Railroad | 2 |
CLC
| Columbia and Cowlitz Railway Company | 4 |
CMHX
| CarMath Incorporated | 3 |
CN
| Canadian National Railways | 2 |
CNA
| Canadian National Railways | 5 |
CNIS
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 39 |
CONX
| ConocoPhillips Company | 1 |
CP
| Canadian Pacific Railway | 18 |
CR
| Conrail | 100 |
CS
| Colorado & Southern | 1 |
CSX
| CSX Railroad | 2 |
CVC
| Canadian National Railways | 1 |
DJTX
| Joseph Transportation Incorporated | 1 |
DME
| Dakota, Minnesota and Eastern | 1 |
DMM
| Dansville and Mount Morris Railroad Comp | 2 |
DRGW
| Denver & Rio Grande Western | 7 |
DTI
| Detroit Toledo & Ironton | 6 |
DWC
| Canadian National Railways | 5 |
EEC
| East Erie Commercial Railroad | 4 |
ELS
| Escanaba and Lake Superior Railroad Comp | 3 |
FCRD
| First Coast Railway | 1 |
FSR
| Fort Smith Railroad Company | 1 |
FSRR
| FerroSur | 1 |
FURX
| First Union Rail | 1 |
FXE
| Ferromex | 2 |
GMRC
| Green Mountain RR | 1 |
GMSR
| Kansas City Southern | 1 |
GN
| Great Northern | 1 |
GTRA
| Golden Triangle Railroad | 2 |
GTW
| Grand Trunk Western | 11 |
GVSR
| Galveston Railroad L.P. | 3 |
HATX
| Helm Financial Corporation | 2 |
HCGX
| COMPASS MINERALS INTERNATIONAL INC | 1 |
HLMX
| Helm Financial Corporation | 1 |
HS
| H and S Railroad Company | 7 |
IAIS
| Iowa Interstate | 2 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 3 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 2 |
IFRX
| Infinity Rail LLC | 1 |
IMRL
| I&M Rail Link | 1 |
KCS
| Kansas City Southern | 57 |
KELX
| Kellogg Company | 9 |
LBR
| Lowville and Beaver River Railroad Compa | 1 |
LNAC
| Chattahoochee Bay Railroad, LLC | 1 |
LRS
| Laurinburg and Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 2 |
MEC
| Maine Central | 6 |
MET
| Modesto and Empire Traction Company | 1 |
MILW
| Milwaukee Road | 5 |
MKT
| Missouri-Kansas-Texas | 3 |
MMA
| Montreal, Maine & Atlantic | 7 |
MP
| Missouri Pacific | 81 |
MR
| McCloud Railway Company | 2 |
MRL
| Montana Rail Link | 3 |
MRS
| Manufacturers Railway | 2 |
MSRC
| Kansas City Southern | 2 |
MWCX
| Midwest Railcar Corporation | 16 |
NADX
| General Electric Rail Services | 3 |
NAR
| Northern Alberta Railways | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 3 |
NOKL
| Northwestern Oklahoma | 1 |
NOPB
| New Orleans Public Belt Railroad | 1 |
NP
| Northern Pacific | 1 |
NS
| Norfolk Southern | 14 |
NSHR
| North Shore | 10 |
NW
| Norfolk & Western | 4 |
NYC
| New York Central | 2 |
ONT
| Ontario Northland Railway | 1 |
PACX
| Plasser American Corporation | 1 |
PLTX
| Potlatch Corporation | 1 |
RBBQ
| Chicago, Burlington and Quincy Reefers | 1 |
RBOX
| Railbox Company | 1 |
RGS
| Rio Grande Southern | 1 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 3 |
RKCX
| Knox Kershaw Incorporated | 1 |
SKRX
| Schuylkill Railcar L.P. | 2 |
SLGG
| Progress Rail Services Corporation | 1 |
SLSF
| Saint Louis-San Francisco | 12 |
SOO
| Soo Line | 1 |
SOU
| Southern | 11 |
SP
| Southern Pacific | 9 |
SPCX
| Qwest Communications Corporation | 1 |
SRN
| Sabine River & Northern | 4 |
SRY
| Southern Railway of British Columbia Lim | 7 |
SSW
| St Louis Southwestern (Cotton Belt) | 6 |
TASD
| Terminal Alabama State Docks | 1 |
TBOX
| TTX Company | 2 |
TCWR
| Twin Cities and Western | 1 |
TFM
| Kansas City Southern De Mexico | 1 |
TM
| Texas-Mexican | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 10 |
TR
| Tomahawk Railway L.P. | 1 |
UELX
| ADM Transportation Company | 1 |
UP
| Union Pacific Railroad Company | 25 |
USLX
| General Electric Rail Services | 2 |
WC
| Wisconsin Central | 2 |
WCOR
| Wellsboro and Corning Railroad Company | 2 |
WCTR
| WCTU Company White City Terminal Railway | 1 |
WGCR
| Wiregrass Central Railroad. Incorporated | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 1 |
WP
| Western Pacific | 6 |
WSOR
| Wisconsin & Southern | 4 |
YARR
| Youngstown and Austintown Railroad | 2 |