 On March 12, 2010, Bob FM replaced Jack FM on 107.1, making it the second station owned by Results Radio to do so.The station's construction permit was originally licensed by the Federal Communications Commission (FCC) to long-time North State broadcaster Steve Thomas and then the license was transferred to McCarthy Wireless, Inc. (licensee of other Redding area radio stations).Prior to being assigned by the FCC the call sign (call letters) of KESR, the station was originally licensed as KISK .