​Missouri Sports Radio, which owned KFNS(AM) in 1998, purchased KZMM, which was licensed to Troy, MO., in 1998. Call letters were changed to KFNS-FM. The purpose of the purchase was to give KFNS, with its relatively weak AM signal, better coverage in St. Charles County and west St. Louis County. The FM station was spun off by a subsequent owner of the sports station combo at a financial loss in 2009, and the new owners, Westplex Broadcasting, retained the call letters..