| 1 | WKRD | WALKER, DERRICK RACING INC | | | SCAC4 |
| 2 | WKRF | WALKER FUELS | | | SCAC4 |
| 3 | WKRG | WALKER GROUP INC, THE | | | SCAC4 |
| 4 | WKRL | Western Kentucky Ry., L.L.C. | added 4/1995; 7/2000; eliminated 7/2003; 7/2005 | | NAKINA |
| 5 | WKRL | Western Kentucky Ry., L.L.C. | added 4/95; 7/2000 | | NRHS |
| 6 | WKRL | WESTERN KENTUCKY RAILWAY, LLC | | | PWRC |
| 7 | WKRL | Western Kentucky Railway | | | RSRV |
| 8 | WKRL | WESTERN KENTUCKY RAILWAY LLC | | | SCAC4 |
| 9 | WKRM | WARKENTIN, ROBERT & MARILYN | | | SCAC4 |
| 10 | WKRO | WALKER OIL CO | | | SCAC4 |
