ABOX
| TTX Company | 18 |
AGR
| Alabama and Gulf Coast | 40 |
ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
AOK
| Arkansas-Oklahoma Railroad | 4 |
ARR
| Alaska Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 23 |
ATW
| Atlantic and Western | 30 |
AZER
| Arizona Eastern Railway Company | 1 |
BAEX
| Andersons | 2 |
BAR
| Bangor & Aroostook | 5 |
BKTY
| Union Pacific Railroad Company | 419 |
BM
| Boston & Maine | 3 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 82 |
BO
| Baltimore & Ohio | 1 |
CAMY
| CAMP CHASE RAILWAY COMPANY, LLC | 1 |
CFWR
| Caney Fork and Western Railroad | 1 |
CIBX
| CIT Group/Capital Finance, Inc | 1 |
CIC
| Cedar Rapids & Iowa City | 11 |
CKIX
| C.K. Industries | 25 |
CMHX
| CarMath Incorporated | 8 |
CMQ
| CENTRAL MAINE & QUEBEC RAILWAY | 4 |
CN
| Canadian National Railways | 9 |
CNA
| Canadian National Railways | 8 |
CNIS
| Canadian National Railways | 4 |
CNW
| Chicago & Northwestern | 8 |
CO
| Chesapeake & Ohio | 1 |
COER
| Crab Orchard & Egyptian | 4 |
CP
| Canadian Pacific Railway | 47 |
CPAA
| Canadian Pacific Railway | 4 |
CR
| Conrail | 4 |
CRLE
| Coe Rail Incorporated | 8 |
CSX
| CSX Railroad | 75 |
CUOH
| Columbus and Ohio River Railroad Company | 1 |
DH
| Delaware & Hudson | 1 |
DME
| Dakota, Minnesota and Eastern | 1 |
DMM
| Dansville and Mount Morris Railroad Comp | 4 |
DODX
| Department Of Defense | 5 |
DRGW
| Denver & Rio Grande Western | 1 |
EEC
| East Erie Commercial Railroad | 8 |
EL
| Erie Lackawanna | 2 |
FJG
| Fonda Johnstown & Gloversville RR | 1 |
FSRR
| FerroSur | 16 |
FXE
| Ferromex | 10 |
GACX
| General American Marks Company | 19 |
GMO
| Gulf Mobile & Ohio | 1 |
GMRC
| Green Mountain RR | 13 |
GN
| Great Northern | 1 |
GNRR
| Georgia Northeastern | 2 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
GR
| Grand Rapids Eastern Railroad Incorporated | 1 |
GTW
| Grand Trunk Western | 3 |
HCRY
| Huron Central Railway | 8 |
HN
| Hutchinson and Northern Railway Company | 3 |
HS
| H and S Railroad Company | 18 |
IANR
| Iowa Northern Ry | 1 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 3 |
KCS
| Kansas City Southern | 66 |
KCSM
| Kansas City Southern De Mexico | 3 |
KXHR
| Knoxville & Holston River RR | 3 |
LBR
| Lowville and Beaver River Railroad Compa | 3 |
LFCD
| Linea Coahuila Durango S.A. de C.V. | 1 |
LRS
| Laurinburg and Southern | 88 |
LRWN
| Little Rock & Western | 6 |
LVRC
| Lamoille Valley | 1 |
LVRR
| Lycoming Valley | 3 |
LW
| Louisville and Wadley Railway Company | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 6 |
MEC
| Maine Central | 24 |
MISX
| Milwaukee Solvents and Chemicals Corporation | 2 |
MMA
| Montreal, Maine & Atlantic | 2 |
MP
| Missouri Pacific | 8 |
MPA
| Maryland and Pennsylvania Railroad | 1 |
MQT
| Marquette Rail | 7 |
MRL
| Montana Rail Link | 18 |
MSDR
| Knoxville & Holston River Railroad | 1 |
MWCX
| Midwest Railcar Corporation | 7 |
NADX
| General Electric Rail Services | 2 |
NC
| CSX Transportation Incorporated | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 3 |
NOKL
| Northwestern Oklahoma | 2 |
NS
| Norfolk Southern | 66 |
NW
| Norfolk & Western | 5 |
OAR
| Old Augusta Railroad | 3 |
OC
| OC | 1 |
ONT
| Ontario Northland Railway | 2 |
PC
| Penn Central | 6 |
PRR
| Pennsylvania Railroad | 5 |
QC
| Quebec Central | 1 |
RBMN
| Reading Blue Mountain & Northern | 1 |
RBOX
| Railbox Company | 217 |
RFP
| Richmond Fredericksburg & Potomac | 2 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
SGLR
| Seminole Gulf | 4 |
SLR
| St Lawrence & Atlantic | 1 |
SMW
| St Marys Railway West LLC | 8 |
SNC
| Saratoga & North Creek Railway | 22 |
SOO
| Soo Line | 1 |
SOU
| Southern | 104 |
SP
| Southern Pacific | 31 |
SRN
| Sabine River & Northern | 5 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TBOX
| TTX Company | 3 |
TOE
| Texas Oklahoma and Eastern RR Company | 4 |
TR
| Tomahawk Railway L.P. | 2 |
UP
| Union Pacific Railroad Company | 4 |
WC
| Wisconsin Central | 7 |
WKWR
| WKWR | 1 |
WP
| Western Pacific | 4 |
WRWK
| Providence & Worchester Railroad | 17 |
WTRM
| Warren and Trumbull Railroad Company | 1 |
YKR
| York Rail | 2 |
YVRR
| Yadkin Valley | 2 |