AGR
| Alabama and Gulf Coast | 10 |
ALM
| Arkansas Louisiana and Mississippi Railr | 2 |
AOK
| Arkansas-Oklahoma Railroad | 3 |
ASAB
| Bay Line Railroad LLC | 10 |
ATW
| Atlantic and Western | 4 |
BAYL
| Bay Line, LLC | 1 |
BKTY
| Union Pacific Railroad Company | 31 |
BNSF
| BNSF Railway | 1 |
CFWR
| Caney Fork and Western Railroad | 1 |
CIRR
| Chattahoochee Industrial Railroad | 2 |
CNW
| Chicago & Northwestern | 11 |
COER
| Crab Orchard & Egyptian | 2 |
CSX
| CSX Railroad | 4 |
EEC
| East Erie Commercial Railroad | 40 |
FCRD
| First Coast Railway | 3 |
GTRA
| Golden Triangle Railroad | 1 |
HLMX
| Helm Financial Corporation | 3 |
HS
| H and S Railroad Company | 25 |
KCS
| Kansas City Southern | 9 |
KYLE
| Kyle Railroad | 10 |
MSDR
| Knoxville & Holston River Railroad | 1 |
NADX
| General Electric Rail Services | 1 |
NS
| Norfolk Southern | 8 |
SOU
| Southern | 1 |
SRN
| Sabine River & Northern | 11 |
WRWK
| Providence & Worchester Railroad | 3 |