In November 1926, the station first signed on the air. The original call sign was WLBC.[4] It was originally powered at 250 watts and was owned by The Tri-City Radio Corporation. WLBC was a CBS RadioNetwork affiliate, carrying its dramas, comedies, sports and news during the "Golden Age of Radio". In the 1950s, when network programming moved from radio to television, WLBC switched to a full service, middle of the road (MOR) format of popular adult music, news and sports.
WLBC's call sign was changed to WXFN on October 2, 1996,[5] in conjunction with the move from a country music format to sports radio.[6] The WLBC call letters are still used by co-owned WLBC-FM at 104.1 FM. The WLBC call sign was also used on UHF channel 49 as a commercial TV station until 1971, when WLBC-TV became public television station WIPB.
As a sports station, WXFN initially relied on programming from One on One Sports.[6] In 2011, the station ended a 10-year affiliation with ESPN Radio and joined Fox Sports Radio; the move was in part prompted by concerns that obligations to carry ESPN Radio's national play-by-play broadcasts would interfere with WXFN's ability to air local sports.[7]
The call sign was changed to WMUN on May 16, 2022.[5] Following the change, the station began airing promos announcing that it was "building a new radio station for Muncie and Delaware County".[8] In late 2022, WMUN began adding local talk programming to its lineup and marketing as "The Talk of Muncie", while retaining some sports programming.[9]