 The call letters had previously belonged to a station in Aurora, Illinois, for the previous 30 years (see below).On February 19, 1994, with its new call sign of WMRO, the station began playing an oldies music format.On April 1, 2006, the station flipped to a hot adult contemporary music format because of the area's changing demographics as a Nashville bedroom community and another station in the county switching to an oldies format.