WBIR-AM signed on in 1941 from Knoxville, Tennessee. Jesse Birdwell owned the station and sold it in 1944 to a consortium of owners led by the Nunn family.
WBIR-TV signed on the air in 1956. At some point, WBIR-FM also signed on. Taft Broadcasting, a member of the consortium, purchased the WBIR stations outright in 1959.
WBIR-AM was part of NBC’s all-news network (NBC News & Information Service) in the mid-1970s before flipping to an adult standards format in 1980, renamed WHEL.
In 1982, it began simulcasting sister station WIMZ-FM’s rock programming as WIMZ-AM. After a brief Top 40 format, WIMZ became WEZK-AM in 1993, simulcasting WEZK-FM’s adult contemporary format.
In 1995, the station went back to WIMZ-AM and adopted an all-sports format. All-news returned in 2002 when the station became WJXB-AM.
Today, it is WIFA-AM, a Christian station owned by Progressive Media.
Source: Knoxville Radio History