The rebroadcaster moved to FM in 1995 and adopted its current call sign at that time.
The station eventually obtained authorization for 24 hour operation ("Class B" status) and the call letters were changed to the current call sign in 1979.
In 1995, the station adopted an alternative rock format and its current call sign and branding.
Christian Broadcasting System purchased the station in 1997 and installed the current call sign and format.
It first began broadcasting at 93.3 FM under the current call sign.
The club's current call sign, K9IU, was issued in 1962.
KESP gained its current call sign, and format, in the early 2000s.
The current call signs were assumed on July 15, 2004.
The station adopted its current call sign on 26 February 1988.
WFTD's current call sign has remained with the station since the late 1980s.