AGR
| Alabama and Gulf Coast | 1 |
AM
| Arkansas & Missouri | 2 |
ANR
| Angelina and Neches River Railroad | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 5 |
ATW
| Atlantic and Western | 2 |
BAEX
| Andersons | 8 |
BAYL
| Bay Line, LLC | 1 |
BCOL
| Canadian National Railways | 3 |
BN
| Burlington Northern | 4 |
BNSF
| BNSF Railway | 17 |
CBQ
| Chicago Burlington & Quincy | 4 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CIC
| Cedar Rapids & Iowa City | 2 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CMHX
| CarMath Incorporated | 7 |
CN
| Canadian National Railways | 8 |
CNA
| Canadian National Railways | 3 |
CNW
| Chicago & Northwestern | 8 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 6 |
CSX
| CSX Railroad | 7 |
CVC
| Canadian National Railways | 1 |
DODX
| Department Of Defense | 1 |
DRGW
| Denver & Rio Grande Western | 3 |
DWC
| Canadian National Railways | 3 |
EEC
| East Erie Commercial Railroad | 8 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FBOX
| TTX Company | 1 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FCRD
| First Coast Railway | 1 |
FXE
| Ferromex | 2 |
GMO
| Gulf Mobile & Ohio | 1 |
GMRC
| Green Mountain RR | 2 |
GNWR
| Genesee and Wyoming Railroad Company | 4 |
GTW
| Grand Trunk Western | 4 |
HCGX
| COMPASS MINERALS INTERNATIONAL INC | 1 |
HDTX
| Huish Detergents, Inc | 1 |
HPJX
| Helm-Pacific Leasing | 4 |
HS
| H and S Railroad Company | 7 |
IAIS
| Iowa Interstate | 2 |
IATR
| Iowa Traction Railroad Company | 2 |
ICG
| Illinois Central Gulf | 5 |
KCS
| Kansas City Southern | 5 |
KYLE
| Kyle Railroad | 3 |
LRS
| Laurinburg and Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 2 |
MEC
| Maine Central | 2 |
MISX
| Milwaukee Solvents and Chemicals Corporation | 2 |
MKT
| Missouri-Kansas-Texas | 1 |
MMA
| Montreal, Maine & Atlantic | 1 |
MP
| Missouri Pacific | 13 |
MRL
| Montana Rail Link | 1 |
MRS
| Manufacturers Railway | 2 |
MWCX
| Midwest Railcar Corporation | 5 |
NADX
| General Electric Rail Services | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 3 |
NS
| Norfolk Southern | 8 |
NW
| Norfolk & Western | 2 |
PC
| Penn Central | 1 |
PGR
| Progressive Rail, Inc | 2 |
RBOX
| Railbox Company | 8 |
RI
| RI | 1 |
SLC
| San Luis Central Railroad Company | 1 |
SOO
| Soo Line | 3 |
SOU
| Southern | 17 |
SP
| Southern Pacific | 10 |
SRN
| Sabine River & Northern | 6 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 6 |
TBOX
| TTX Company | 9 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 12 |
UPP
| Union Pacific Passenger | 1 |
WC
| Wisconsin Central | 2 |
WP
| Western Pacific | 2 |
WRWK
| Providence & Worchester Railroad | 2 |
WSOR
| Wisconsin & Southern | 1 |