APA
| Apache Railway Company | 4 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BN
| Burlington Northern | 8 |
BNSF
| BNSF Railway | 10 |
CNW
| Chicago & Northwestern | 3 |
CP
| Canadian Pacific Railway | 3 |
CRDX
| Chicago Freight Car Leasing Company | 21 |
CSX
| CSX Railroad | 1 |
GREX
| Georgetown Rail Equipment Company | 13 |
HZGX
| Herzog Contracting Corporation | 7 |
KCS
| Kansas City Southern | 1 |
MDR
| Kansas City Southern | 2 |
MP
| Missouri Pacific | 1 |
NS
| Norfolk Southern | 1 |
SI
| Union Pacific Railroad Company (Spokane International) | 1 |
SP
| Southern Pacific | 2 |
UP
| Union Pacific Railroad Company | 16 |