ABOX
| TTX Company | 2 |
AGR
| Alabama and Gulf Coast | 6 |
AOK
| Arkansas-Oklahoma Railroad | 39 |
ATW
| Atlantic and Western | 11 |
BCLR
| Bay Colony | 1 |
BKTY
| Union Pacific Railroad Company | 34 |
BM
| Boston & Maine | 49 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 36 |
CAGY
| Columbus & Greenville Railway | 1 |
CFWR
| Caney Fork and Western Railroad | 1 |
CIBX
| CIT Group/Capital Finance, Inc | 1 |
CIC
| Cedar Rapids & Iowa City | 2 |
CMHX
| CarMath Incorporated | 1 |
CMQ
| CENTRAL MAINE & QUEBEC RAILWAY | 4 |
CN
| Canadian National Railways | 20 |
CNA
| Canadian National Railways | 21 |
CNIS
| Canadian National Railways | 14 |
CNW
| Chicago & Northwestern | 4 |
COER
| Crab Orchard & Egyptian | 13 |
CP
| Canadian Pacific Railway | 39 |
CPAA
| Canadian Pacific Railway | 6 |
CRLE
| Coe Rail Incorporated | 3 |
CSX
| CSX Railroad | 85 |
CTR
| Clinton Terminal Railroad Company | 1 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
DWC
| Canadian National Railways | 17 |
EEC
| East Erie Commercial Railroad | 1 |
FBOX
| TTX Company | 27 |
FSRR
| FerroSur | 2 |
GMRC
| Green Mountain RR | 10 |
GTW
| Grand Trunk Western | 5 |
HS
| H and S Railroad Company | 3 |
IANR
| Iowa Northern Ry | 1 |
IATR
| Iowa Traction Railroad Company | 2 |
IBT
| International Bridge and Terminal Company | 8 |
IC
| Illinois Central | 5 |
KCS
| Kansas City Southern | 12 |
LBR
| Lowville and Beaver River Railroad Compa | 1 |
LRS
| Laurinburg and Southern | 81 |
LW
| Louisville and Wadley Railway Company | 5 |
MB
| Meridian & Bigbee | 1 |
MCSA
| Moscow Camden and San Augustine Railroad | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MEC
| Maine Central | 123 |
MP
| Missouri Pacific | 4 |
MSDR
| Knoxville & Holston River Railroad | 8 |
MWCX
| Midwest Railcar Corporation | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 10 |
NOKL
| Northwestern Oklahoma | 1 |
NRI
| Nebkota Railway Incorporated | 2 |
NS
| Norfolk Southern | 3 |
NYC
| New York Central | 1 |
OAR
| Old Augusta Railroad | 6 |
ONT
| Ontario Northland Railway | 3 |
QGRY
| Quebec Gatineau Railway Incorporated | 1 |
RBOX
| Railbox Company | 29 |
SCFX
| SCFX | 1 |
SLR
| St Lawrence & Atlantic | 6 |
SMW
| St Marys Railway West LLC | 2 |
SNC
| Saratoga & North Creek Railway | 112 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 5 |
SRN
| Sabine River & Northern | 1 |
TBOX
| TTX Company | 57 |
TR
| Tomahawk Railway L.P. | 3 |
UCRY
| Utah Central | 12 |
UP
| Union Pacific Railroad Company | 4 |
WC
| Wisconsin Central | 2 |
WFRX
| WELLS FARGO RAIL CORPORATION | 1 |
WP
| Western Pacific | 1 |
WRWK
| Providence & Worchester Railroad | 9 |
YKR
| York Rail | 3 |
YVRR
| Yadkin Valley | 1 |