| 1 | KPLX | Western Resources, Inc. | 7/2000-7/2005 | | NAKINA |
| 2 | KPLX | Agrex, Inc. | added 1/1985; eliminated 1/1988 | | NAKINA |
| 3 | KPLX | Koppel, Inc. | added 10/1979; 1/1980; eliminated 1/1985 | | NAKINA |
| 4 | KPLX | Koppel, Inc. | 1/80; eliminated 1/85 | | NRHS |
| 5 | KPLX | Agrex, Inc. | added 1/85; eliminated 1/88 | | NRHS |
| 6 | KPLX | Western Resources, Inc. | Jul-00 | | NRHS |
| 7 | KPLX | WESTAR ENERGY [WESTERN RESOURCES, INC.; AGREX INC.; KOPPEL INC.] | | | PWRC |
| 8 | KPLX | Koppel (Western Resources) | | | RSRV |
| 9 | KPLX | WESTERN RESOURCES, INC. | | | SCAC4 |
| 10 | KPLX | Koppel (Western Resources) | | USA | TRAFFIC |