WZFT's studios are located at The Rotunda shopping center in Baltimore, and its transmitter is based atop Television Hill in the city's Woodberry district.

By the late 1970s, WDJQ-FM made an attempt to do an all-disco format, which failed in the ratings, and the station went back to Top 40 at the end of 1979.

In June 1980, Scripps-Howard Broadcasting acquired WDJQ-FM, and at noon on July 2, 104.3 FM became WBSB under the handle "B-104", but retaining the previous Top 40 format.

Radio and TV personalities Glenn Beck and Pat Gray hosted a show on WBSB for several years in the late 1980s and early 1990s.

By 1991, the Top 40 format suffered a decline in audience and revenue due to the rise of alternative rock and hip hop.

After just 9 months of "Soft", on October 14, at 3 pm, the station flipped to 1970s-based classic hits as "104.3 The Colt", using the call letters WOCT.

In 2001, the station returned to mainstream classic rock as "Baltimore 104.3", and then a year later briefly brought back the heritage "B-104" name as WXFB ("B-104.3").

The debut of "Z104.3" marked the first time that Baltimore had a Top 40 station since 2001, when WXYV flipped to mainstream urban, and also brought the CHR format back to 104.3 FM after a 17-year absence.

Hot AC-formatted WWMX, a former sister station now owned by Entercom, had been leaning towards a mainstream Top 40 direction beginning the preceding year to try and fill that void.