ABOX
| TTX Company | 1 |
AGR
| Alabama and Gulf Coast | 2 |
ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 3 |
ATW
| Atlantic and Western | 3 |
BAEX
| Andersons | 2 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 5 |
BRW
| Black River And Western | 1 |
CCR
| Corinth & Counce | 1 |
CIRR
| Chattahoochee Industrial Railroad | 3 |
CMHX
| CarMath Incorporated | 3 |
CN
| Canadian National Railways | 6 |
CNA
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 2 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 19 |
CVC
| Canadian National Railways | 2 |
DME
| Dakota, Minnesota and Eastern | 1 |
EEC
| East Erie Commercial Railroad | 3 |
FBOX
| TTX Company | 4 |
FCRD
| First Coast Railway | 1 |
FSRR
| FerroSur | 2 |
GFRR
| Georgia and Florida Railnet | 2 |
GMRC
| Green Mountain RR | 1 |
GVSR
| Galveston Railroad L.P. | 2 |
HLMX
| Helm Financial Corporation | 4 |
HPJX
| Helm-Pacific Leasing | 1 |
HS
| H and S Railroad Company | 1 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 1 |
IC
| Illinois Central | 1 |
KCS
| Kansas City Southern | 1 |
LW
| Louisville and Wadley Railway Company | 3 |
MB
| Meridian & Bigbee | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MEC
| Maine Central | 5 |
MP
| Missouri Pacific | 2 |
MRL
| Montana Rail Link | 1 |
MSDR
| Knoxville & Holston River Railroad | 2 |
MSRC
| Kansas City Southern | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 6 |
NWR
| Nashville & Western Railroad Corp. | 1 |
NYC
| New York Central | 10 |
PDRR
| Pee Dee River RR | 3 |
PGR
| Progressive Rail, Inc | 1 |
QGRY
| Quebec Gatineau Railway Incorporated | 1 |
RBOX
| Railbox Company | 5 |
RMMX
| Andersons - Railgroup | 1 |
SFRD
| Santa Fe Refridgerator Line | 1 |
SLGG
| Progress Rail Services Corporation | 2 |
SOO
| Soo Line | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 5 |
SSW
| St Louis Southwestern (Cotton Belt) | 4 |
STE
| Stockton Terminal and Eastern RR | 1 |
TBOX
| TTX Company | 2 |
TFM
| Kansas City Southern De Mexico | 1 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 5 |
USNX
| Department of Defense (Navy) | 1 |
VR
| Valdosta Railway | 1 |
WC
| Wisconsin Central | 2 |
WLO
| Waterloo Railway Company (Illinois Central) | 2 |
WP
| Western Pacific | 1 |
WSOR
| Wisconsin & Southern | 1 |