94.3 later changed to an easy listening format as WUUU. The slogan was "The Station For You". It was off the air for a short time until January 18, 1982 when it switched its call sign to WETQ. It carried a country music format known as "Q-94FM".
On March 25, 1985, the station changed to WKNF-FM and became "Magic 94," flipping to an oldies sound. In April 1993, it became a classic country station as "K-94". In September 1993, the station shifted to CHR/Top 40 and changed the on-air position to "94Z".
On July 1, 1994, WKNF-FM switched to WNFZ to reflect on-air branding of 94Z and became an alternative rock station. Then in 2008, WNFZ refocused, becoming an active rock outlet. Between 1994 and 2013 the station was branded variously "94Z", "The Planet", "94.3 Extreme Radio" and "94-3 The X."
Switch to Talk, Then Jack-FM
WNFZ simulcast former sister station 95.7 WVRX until October 31, 2013. At that point, The X alternative rock format moved to 95.7.[6] At Midnight on November 1, WNFZ flipped to a Talk format, formerly broadcast on WNOX-FM. The ownership switched to Oak Ridge FM, Inc. under the branding, "KnoxTalkRadio 94.3 WNFZ".[7]
At noon on October 21, 2015, WNFZ returned to alternative rock as "94Z".
On March 21, 2019, WNFZ was sold to Midwest Communications and changed its format from alternative rock to adult hits, branded as "94.3 Jack FM".[8] It began carrying the JACK-FM format, similar to co-owned WCJKNashville, one of that market's highest rated stations. The sale closed on June 4, 2019, at a price of $2 million.