AM
| Arkansas & Missouri | 2 |
ANKX
| A and K Railroad Materials Incorporated | 2 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BKTY
| Union Pacific Railroad Company | 4 |
BN
| Burlington Northern | 9 |
BNSF
| BNSF Railway | 1 |
BO
| Baltimore & Ohio | 1 |
BS
| Birmingham Southern RR | 1 |
BVRY
| Brandywine Valley Railroad Company | 2 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
CR
| Conrail | 3 |
CTRN
| Union Pacific Railroad Company | 1 |
DEAX
| DEAX | 2 |
DRGW
| Denver & Rio Grande Western | 6 |
GACX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 1 |
GNTX
| TTX Company | 4 |
GONX
| Railgon Company | 3 |
GRW
| Gary Railway | 1 |
GTW
| Grand Trunk Western | 1 |
GWWR
| Gateway Western | 2 |
HROX
| HROX | 1 |
HZGX
| Herzog Contracting Corporation | 2 |
IHB
| Indiana Harbor Belt | 2 |
JETX
| Jefferson Transportation LLC | 1 |
LN
| Louisville & Nashville | 1 |
LRS
| Laurinburg and Southern | 1 |
LT
| Lake Terminal Railroad Company | 1 |
MWCX
| Midwest Railcar Corporation | 3 |
NS
| Norfolk Southern | 2 |
NYC
| New York Central | 1 |
PAL
| Paducah & Louisville | 1 |
PC
| Penn Central | 1 |
RMDX
| American Refrigerator Transit Company | 1 |
SCRF
| South Carolina Central | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SMIX
| Structural Metals Incorporated | 3 |
SOO
| Soo Line | 1 |
SPSX
| Progress Rail Services Corp | 4 |
TCTX
| Tube City Incorporated | 1 |
TFM
| Kansas City Southern De Mexico | 1 |
TN
| Texas and Northern Railway Company | 1 |
TNMR
| Texas and New Mexico | 1 |
TRLX
| Texas Railcar Leasing Company | 1 |
UP
| Union Pacific Railroad Company | 13 |
WAMX
| Webb Asset Management | 1 |
WC
| Wisconsin Central | 1 |
WCRC
| Washington Central | 1 |