The station signed on the air on April 2, 1977; 47 years ago (1977-04-02).[4] It began as a Class A station broadcasting at 96.7 MHz. The original call sign was KLMT. On September 18, 1987, the station changed its call sign to KRXX, on March 12, 1990, to KEYR, on August 30, 1999, to KLRK, and then on July 15, 2010, to KRMX.[5] In July 2024, the call letters were switched to KZBI.
KRMX aired a Texas country music format as "The Shooter." In December 2023, the station was sold for $1.35 million to First Dallas Media, Inc.[6] That non-profit organization also owns Christian radio station KCBI in Dallas. FM 92.9 was acquired to give listeners in the Waco and Temple areas access to KCBI's programming. In July 2024, it became a repeater of KCBI, playing Christian adult contemporary music with some Christian talk and teaching programs as well. The county format previously heard on 92.9 moved to 104.9 KBHT, licensed to Bellmead, Texas, and owned by M&M Broadcasters.[7]
