WZLK signed on the air in August 1992 under the ownership of Kenneth and Lonnie Osborne. The first songs to play were that of a classic country nature blended with Kentucky bluegrass. The station was co-owned with WLSI in Pikeville, KY. WZLK became a second country outlet in Pike County. FCC.GOV
In March 2005, East Kentucky Broadcasting changed the format of WZLK to a hybrid CHR/Alternative format, giving Pike County a local outlet for both Top 40 and Alternative music. The first song played on Z 107.5 in March 2005 was "Self Esteem" by The Offspring.
On September 2, 2015, WZLK flipped to a pure fully fledged Top 40/CHR format.
Effective May 29, 2019, East Kentucky Broadcasting sold WZLK, their eight sister stations, and five translators to Mountain Top Media LLC for $2.85 million.