In previous years, the call letters KUSN were assigned to an AM station in San Diego, California.[3]
During the period from 1955 until 1979, the KUSN call letters were assigned to an AM station on 1270 kHz in St. Joseph, MO, now licensed as KGNM. KUSN-FM was assigned to St.Joseph, MO from 1960 until 1979, the FM assignment now carries the KKJO-FM call sign. KUSN-FM was later assigned to Pueblo, Colorado from 1986 to 1988 at 107.1 FM.