The station signed on October 26, 1981, with the call letters KMZQ-FM. KMZQ went through many changes over its 12-year run. KMZQ was known as "Q-100" and "Klassy 100". From 1995 to 2005, it was known as "Lite 100.5 FM".
On June 24, 2005, at 2 p.m., after playing "Leaving Las Vegas" by Sheryl Crow, KMZQ-FM began stunting with Christmas music; 45 minutes later, the stunt shifted to movie theme songs with the sound of a Roulette wheel in between. At 3 p.m., the stunt ended with the station's new voiceover artist Howard Cogan asking to "please cut the cheesy Roulette wheel sound effect", and declaring that Vegas needed a new radio station, as well as revealing that he was the new "operator" of the station, winning it in a poker match from "some guy named Joel" (most likely a reference to then-CEO of Infinity Broadcasting Joel Hollander). Shortly thereafter, "Lite 100.5" became Jack FM, with a variety hits format. The call letters were quickly changed to KKJJ. The first song on "Jack FM" was The Flying Lizards' cover of "Money (That's What I Want)". KMZQ-FM's call letters would be moved to a station on 99.3 FM in Payson, Arizona, co-owned with KMZQ (670 AM) in Las Vegas Valley.
Logo as KXNT-FM
In July 2010, CBS Radio announced that starting on August 16, 2010, KKJJ would be replaced with a simulcast of sister station KXNT.[3] On August 16, at 5:03 p.m., after playing "Talk Talk" by Talk Talk, KKJJ began simulcasting KXNT. With the change, the station changed call letters to KXNT-FM.[4][5]
On September 4, 2015, at 9 a.m., after stunting for an hour with songs from multiple genres and liners redirecting KXNT listeners to 840 AM, KXNT-FM flipped to rhythmic hot AC as "Q100.5".[6] The first song on "Q100.5" was "This Is How We Do It" by Montell Jordan.[7] The station changed to its current KXQQ-FM call sign on September 28, 2015.
On February 2, 2017, CBS Radio announced it would merge with Entercom.[8] The merger was approved on November 9, 2017, and was consummated on November 17.[9][10]