AERC
| Albany and Eastern Railroad Company | 6 |
AGR
| Alabama and Gulf Coast | 37 |
ALAB
| Alabama Railroad | 7 |
ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
AM
| Arkansas & Missouri | 1 |
ANGX
| Andersons - Railgroup | 2 |
ATW
| Atlantic and Western | 23 |
BAEX
| Andersons | 2 |
BCLR
| Bay Colony | 6 |
BCOL
| Canadian National Railways | 4 |
BKTY
| Union Pacific Railroad Company | 6 |
BN
| Burlington Northern | 51 |
BNSF
| BNSF Railway | 38 |
BR
| Buffalo and Pittsburgh | 9 |
CAMY
| CAMP CHASE RAILWAY COMPANY, LLC | 1 |
CIRR
| Chattahoochee Industrial Railroad | 12 |
CN
| Canadian National Railways | 60 |
CNA
| Canadian National Railways | 128 |
CNIS
| Canadian National Railways | 42 |
CNW
| Chicago & Northwestern | 90 |
CP
| Canadian Pacific Railway | 69 |
CPAA
| Canadian Pacific Railway | 21 |
CSX
| CSX Railroad | 743 |
CTN
| Canton Railroad Company | 3 |
CUOH
| Columbus and Ohio River Railroad Company | 52 |
EEC
| East Erie Commercial Railroad | 39 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 4 |
FCRD
| First Coast Railway | 26 |
FGLK
| Finger Lakes Railway | 1 |
FXE
| Ferromex | 12 |
GMRC
| Green Mountain RR | 2 |
GNRR
| Georgia Northeastern | 23 |
GNWR
| Genesee and Wyoming Railroad Company | 100 |
GTRA
| Golden Triangle Railroad | 1 |
GTW
| Grand Trunk Western | 38 |
HCRY
| Huron Central Railway | 5 |
HESR
| Huron and Eastern | 15 |
HS
| H and S Railroad Company | 124 |
IANR
| Iowa Northern Ry | 18 |
IATR
| Iowa Traction Railroad Company | 17 |
IC
| Illinois Central | 29 |
ICG
| Illinois Central Gulf | 15 |
IFRX
| Infinity Rail LLC | 2 |
KCS
| Kansas City Southern | 55 |
KWT
| KWT Railway | 2 |
LBR
| Lowville and Beaver River Railroad Compa | 7 |
LRS
| Laurinburg and Southern | 12 |
LRWN
| Little Rock & Western | 12 |
LVRC
| Lamoille Valley | 4 |
LXOH
| Knoxville & Holston River Railroad | 2 |
MB
| Meridian & Bigbee | 1 |
MDR
| Kansas City Southern | 2 |
MP
| Missouri Pacific | 14 |
MQT
| Marquette Rail | 72 |
MRL
| Montana Rail Link | 9 |
MSDR
| Knoxville & Holston River Railroad | 23 |
NDYX
| First Union Rail | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 5 |
NOKL
| Northwestern Oklahoma | 44 |
NOPB
| New Orleans Public Belt Railroad | 2 |
NS
| Norfolk Southern | 908 |
NWR
| Nashville & Western Railroad Corp. | 1 |
NYC
| New York Central | 1 |
OAR
| Old Augusta Railroad | 29 |
OHPA
| Ohio and Pennsylvania Railroad Company | 2 |
ONT
| Ontario Northland Railway | 3 |
PMRX
| Progress Metal Reclamation Company | 1 |
POHC
| Pittsburgh & Ohio Central | 5 |
PRSX
| Progress Rail Service | 1 |
RJCC
| R.J. Corman Railroad/Kentucky Lines | 1 |
RMGX
| Andersons - Railgroup | 17 |
SGLR
| Seminole Gulf | 19 |
SIND
| Southern Indiana Railway Incorporated | 1 |
SLC
| San Luis Central Railroad Company | 12 |
SLGG
| Progress Rail Services Corporation | 59 |
SLR
| St Lawrence & Atlantic | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SOU
| Southern | 1131 |
SPSX
| Progress Rail Services Corp | 5 |
SRN
| Sabine River & Northern | 8 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 4 |
WCCL
| Wisconsin Central | 53 |
WCOR
| Wellsboro and Corning Railroad Company | 23 |
WE
| Wheeling & Lake Erie | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 85 |
WRWK
| Providence & Worchester Railroad | 12 |
WSOR
| Wisconsin & Southern | 8 |
WTRM
| Warren and Trumbull Railroad Company | 55 |
YKR
| York Rail | 4 |
YVRR
| Yadkin Valley | 4 |