Playing country and MOR since its inception in 1974, the original call sign was KIEE until changing to KCFX on December 21, 1983. The new album rock format coincided with a signal improvement to 100 kW. In 1985, KCFX developed the current Fox format in 1985, becoming the first classic rock station in a major market in the country. In 1990, they swapped frequencies with KMZU in Carrollton, jumping from 100.7 MHz to 101.1. They played a blend of artists from the late 1960s, 1970s, and 1980s. In recent years they have started playing some hits from the 1990s by artists like Bruce Springsteen and Scorpions, as well as Collective Soul, Stone Temple Pilots, and Metallica, among others. This comes after years of billing themselves as only playing 1970s rock with some 1960s and 1980s. As the years wore on, they added more 1980s. The station carried The Bob & Tom Show from March 13, 2006 to February 9, 2007 as its morning drive program. A new local morning show featuring former KYYS voices Larry Moffit and Frankie replaced that show. On January 11, 2008, longtime rival rocker KYYS changed formats, prompting KCFX to change its slogan to "Kansas City's Only Classic Rock Station." In October 2008, Cumulus Media had massive layoffs to its stations across the country. Among those released were KCFX morning team Moffit and Frankie. In March 2009, Slacker, longtime heritage Classic Rock DJ from Kansas City, was installed as the KCFX morning show weekdays from 5am to 9am. Program Director Chris Hoffman took over at middays from 9am to 2pm, and longtime heritage Classic Rock DJ Skid Roadie aired on the drive home evenings from 2pm to 7pm. In 2013, Dan McClintock replaced Chris Hoffman as Program Director. KCFX, since 1990 NFL season, was the longtime flagship station for the Kansas City Chiefs of the National Football League, one of the first broadcast agreements where an NFL team associated with an FM station rather than a traditional AM radio station. On December 5, 2019, it was announced that Entercom's WDAF-FM would become the new flagship of the Chiefs radio network with the start of the 2020 season, ending KCFX's thirty year association with the team. The last game broadcast by KCFX was the team's victory in Super Bowl LIV.
KCFX-HD2
On March 18, 2010, KCFX-HD2 signed on with mainstream rock as "103.7 The Dam". On April 29, 2012, KCFX-HD2 and K279BI changed their format to a simulcast of news/talk-formatted KCMO710 AM.
KCFX-HD3
KCFX-HD3 is on the air with Christian as "107.9 The Fountain". In May 2019 KCFX-HD3 and K300CH changed their format to EMF's Air 1 worship music format.
