106.5 The Truth WTKD FM is commonly called The Truth, licensed to Greenville, Ohio as a radio station that broadcasts in most of the Dayton metropolitan area. The owner of WTKD FM is Truth Broadcasting Inc. It started playing in a religious format in the year 1990. Broadcasting with several former call signs, they finally changed their call sign to WTKD in 2021. They are popular for Christian talk and news programs.