The station was assigned the call sign WVZO on 1992-09-02. On 1992-10-12, the station changed its call sign to WZST, on 1994-07-01 to WUSX, and on 1996-03-29 to the current WBKY.[3]
In April 2024, WBKY completed its move from Portage to Stoughton, with its new signal serving Madison and Janesville.[4]