 When the station signed on in 1954, it aired a beautiful music format as KOSI, and was paired with KOSI-FM.In 1981, it became KEZW, and adopted an adult standards format, which would last for the next three decades.On December 27, 2015, KEZW adopted the oldies format from sister station KRWZ, which was sold to Kroenke Sports and Entertainment and flipped to sports as KKSE.