ABS
| Alabama Southern Railroad | 2 |
AC
| Algoma Central | 1 |
AOK
| Arkansas-Oklahoma Railroad | 6 |
ATW
| Atlantic and Western | 19 |
BN
| Burlington Northern | 5 |
BNSF
| BNSF Railway | 7 |
CN
| Canadian National Railways | 16 |
CNIS
| Canadian National Railways | 7 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 6 |
EAMX
| Everest Railcar Services, Inc | 1 |
IFRX
| Infinity Rail LLC | 7 |
IHB
| Indiana Harbor Belt | 13 |
JOBX
| Tealinc Limited | 2 |
JTSX
| Joseph Transportation Incorporated | 3 |
LN
| Louisville & Nashville | 3 |
MMA
| Montreal, Maine & Atlantic | 12 |
NAFX
| General Electric Rail Services | 12 |
NS
| Norfolk Southern | 12 |
SBD
| Seaboard System | 5 |
SOU
| Southern | 1 |
SPEX
| SOUTHERN PARTS & EQUIPMENT INC. | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 64 |
TOE
| Texas Oklahoma and Eastern RR Company | 13 |
UP
| Union Pacific Railroad Company | 10 |
WCRC
| Washington Central | 2 |
WCTR
| WCTU Company White City Terminal Railway | 4 |
YARR
| Youngstown and Austintown Railroad | 3 |