AJPX
| Searles Valley Minerals Operations, Inc. | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
BGEX
| General American Marks Company | 1 |
BO
| Baltimore & Ohio | 2 |
CLSX
| Cargill Incorporated Salt Division | 2 |
CRDX
| Chicago Freight Car Leasing Company | 2 |
CSX
| CSX Railroad | 8 |
GFSX
| General American Marks Company | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 6 |
RFMX
| Caldwell-Baker Company | 2 |
RMGX
| Andersons - Railgroup | 1 |
SAN
| Sandersville | 2 |
SOO
| Soo Line | 1 |
SRIX
| Southwest Rail Industries Incorporated | 1 |
WW
| Winchester & Western | 1 |