When its call letters were KXZX, the station originally had a HAC format and was branded as "96X". When the call letters changed to KMRX, the station was rebranded as "Mix 96.1" and then "Power 96.1". The station aired The Kidd Kraddick Morning Show during this time. In 2017 when the station switched its format to classic hits and became "Big 96.1", the HAC format moved to KELD-FM which rebranded as "106.5 the Planet".
KMRX is managed by J.J. Cook.
Operations Manager is J. Randal Harvey.