 The station is currently owned through licensee Viper Broadcasting, LLC.The station formerly often simulcasted with KFNS (AM) (590 kHz), which is located in the St. Louis suburb of St Charles, Missouri.On July 15, 2009 KFNS-FM began broadcasting an adult hits format, similar to local station WARH-FM (106.5) 
As of September 2009, KFNS-FM changed formats once again, playing a more aggressive adult hits format known as "Westplex 100.7-- Playing Whatever We Feel Like."