AGR
| Alabama and Gulf Coast | 14 |
ALM
| Arkansas Louisiana and Mississippi Railr | 5 |
AN
| Apalachicola Northern | 2 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ASAB
| Bay Line Railroad LLC | 1 |
ATW
| Atlantic and Western | 8 |
BAEX
| Andersons | 1 |
BAR
| Bangor & Aroostook | 1 |
BKTY
| Union Pacific Railroad Company | 21 |
BM
| Boston & Maine | 2 |
CCR
| Corinth & Counce | 1 |
CFWR
| Caney Fork and Western Railroad | 1 |
CHTS
| Penn Eastern Rail Lines Incorporated | 4 |
CIRR
| Chattahoochee Industrial Railroad | 2 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 3 |
COER
| Crab Orchard & Egyptian | 1 |
CP
| Canadian Pacific Railway | 3 |
CPAA
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 12 |
EEC
| East Erie Commercial Railroad | 43 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FGLK
| Finger Lakes Railway | 7 |
GMRC
| Green Mountain RR | 17 |
GTRA
| Golden Triangle Railroad | 1 |
HS
| H and S Railroad Company | 35 |
KCS
| Kansas City Southern | 13 |
LBR
| Lowville and Beaver River Railroad Compa | 12 |
LRS
| Laurinburg and Southern | 2 |
MB
| Meridian & Bigbee | 2 |
MEC
| Maine Central | 22 |
MMA
| Montreal, Maine & Atlantic | 17 |
MRL
| Montana Rail Link | 2 |
MSDR
| Knoxville & Holston River Railroad | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
NADX
| General Electric Rail Services | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NS
| Norfolk Southern | 15 |
NWR
| Nashville & Western Railroad Corp. | 1 |
PAL
| Paducah & Louisville | 1 |
PDRR
| Pee Dee River RR | 1 |
PRL
| Penn Eastern Rail Lines Incorporated | 6 |
SIRX
| Southern Illinois Railcar Company | 2 |
SLC
| San Luis Central Railroad Company | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SNC
| Saratoga & North Creek Railway | 3 |
SOU
| Southern | 3 |
SP
| Southern Pacific | 1 |
SRN
| Sabine River & Northern | 9 |
VR
| Valdosta Railway | 11 |
WC
| Wisconsin Central | 1 |
WRWK
| Providence & Worchester Railroad | 1 |
YB
| Youngstown Belt Railroad Company | 4 |