AGR
| Alabama and Gulf Coast | 2 |
AM
| Arkansas & Missouri | 2 |
AMC
| Arkansas Louisiana and Mississippi Railr | 1 |
AN
| Apalachicola Northern | 1 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
ATW
| Atlantic and Western | 4 |
BAEX
| Andersons | 7 |
BAR
| Bangor & Aroostook | 1 |
BCOL
| Canadian National Railways | 6 |
BN
| Burlington Northern | 8 |
BNSF
| BNSF Railway | 11 |
BR
| Buffalo and Pittsburgh | 3 |
CEFX
| CIT Group/Capital Finance, Inc | 2 |
CHTT
| Chicago Heights Terminal Transfer | 6 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CLC
| Columbia and Cowlitz Railway Company | 6 |
CN
| Canadian National Railways | 11 |
CNA
| Canadian National Railways | 8 |
CNW
| Chicago & Northwestern | 14 |
CP
| Canadian Pacific Railway | 11 |
CRLE
| Coe Rail Incorporated | 10 |
CSBX
| Cargill Incorporated Salt Division | 1 |
CSX
| CSX Railroad | 16 |
DAFX
| Department of Defence Troop Support and Aviation Material Re | 2 |
DODX
| Department Of Defense | 2 |
DRGW
| Denver & Rio Grande Western | 3 |
DWC
| Canadian National Railways | 3 |
EEC
| East Erie Commercial Railroad | 13 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FBOX
| TTX Company | 6 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 3 |
FP
| Fordyce & Princeton Railroad Company | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
GTW
| Grand Trunk Western | 2 |
GVSR
| Galveston Railroad L.P. | 23 |
HCGX
| COMPASS MINERALS INTERNATIONAL INC | 8 |
HESR
| Huron and Eastern | 1 |
HLMX
| Helm Financial Corporation | 1 |
HPJX
| Helm-Pacific Leasing | 4 |
HS
| H and S Railroad Company | 6 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 8 |
IC
| Illinois Central | 6 |
KCS
| Kansas City Southern | 6 |
KYLE
| Kyle Railroad | 2 |
LNAC
| Chattahoochee Bay Railroad, LLC | 1 |
LRWN
| Little Rock & Western | 1 |
LSRC
| Lake State Railway Company | 1 |
LW
| Louisville and Wadley Railway Company | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 5 |
MMA
| Montreal, Maine & Atlantic | 8 |
MNNR
| Minnesota Commercial | 1 |
MP
| Missouri Pacific | 33 |
MR
| McCloud Railway Company | 1 |
MRL
| Montana Rail Link | 5 |
MSDR
| Knoxville & Holston River Railroad | 1 |
MWCX
| Midwest Railcar Corporation | 4 |
NADX
| General Electric Rail Services | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 5 |
NS
| Norfolk Southern | 20 |
NW
| Norfolk & Western | 2 |
NYC
| New York Central | 1 |
PGR
| Progressive Rail, Inc | 2 |
QC
| Quebec Central | 1 |
RBOX
| Railbox Company | 34 |
RGCX
| Rio Grande Chemical LTD | 1 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
RVPR
| Riverport R.R., L.L.C. | 1 |
SLC
| San Luis Central Railroad Company | 3 |
SLGG
| Progress Rail Services Corporation | 3 |
SOO
| Soo Line | 1 |
SOU
| Southern | 18 |
SP
| Southern Pacific | 40 |
SPSX
| Progress Rail Services Corp | 1 |
SRAX
| Southern Rail Associates | 1 |
SRN
| Sabine River & Northern | 5 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 10 |
STE
| Stockton Terminal and Eastern RR | 3 |
TBOX
| TTX Company | 28 |
TKEN
| Tennken Railroad Company Incorporated | 5 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TR
| Tomahawk Railway L.P. | 6 |
TSE
| Texas South-Eastern Railroad Company | 1 |
UP
| Union Pacific Railroad Company | 34 |
UPP
| Union Pacific Passenger | 2 |
VCY
| Galveston Railroad, L.P. | 8 |
VR
| Valdosta Railway | 1 |
WC
| Wisconsin Central | 8 |
WCOR
| Wellsboro and Corning Railroad Company | 1 |
WCTR
| WCTU Company White City Terminal Railway | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 4 |
WP
| Western Pacific | 8 |
WSOR
| Wisconsin & Southern | 1 |