KOCY-FM: 1946-1950

The first was KOCY-FM, which was the first FM station to broadcast in the state, opening on September 16, 1946.^[2] Initially broadcasting on 98.5 MHz, KOCY-FM was co-owned with KOCY (1340 AM). KOCY-FM quickly increased its effective radiated power, to 3,000 watts in January 1947;^[3] it changed frequencies to 94.7 in mid-1947.

A year later, KOCY-FM activated a new transmitter site and increased its power to 70,000 watts, claiming "the tallest exclusive FM tower in the world".^[4] KOCY-FM was additionally used to feed eight AM stations in a statewide network that began operations in September.^[5]

KOCY-FM ceased operations in 1950. Its tower was acquired by station KOMA (1520 AM) for use in broadcasting television.^[6]

KEFM/KMWC: 1958-1965

It would be another eight years before a new 94.7 station operated; on August 17, 1958, Carl E. Williams opened KEFM, offering a "fine music" format.^[7] The fine music outlet was hit with staff turmoil in 1960 when it moved to a more upbeat music policy during the daytime hours; former station manager Earl Thomas claimed no involvement with the change.^[8]

1963 saw an even larger change; the station moved to Midwest City and adopted a new KMWC call sign to reflect its home. KMWC, along with KJEM-AM-FM, carried daily radio broadcasts from Tinker Air Force Base.^[9] However, Williams made an ill-advised move; he leased the station for six months in 1964 to Marlin Joe Pershall without Federal Communications Commission approval. In March 1965, the FCC fined Williams $1,000.^[10] Later that year, the station was deleted, and the FCC set aside the fine that December.^[11]

Country: 1965-1996

The Electronic Broadcasting Company applied on October 9, 1965, to build a new FM radio station on 94.7 in Oklahoma City. The FCC approved its application for a construction permit on August 17, 1966,^[12] and KEBC—named for the owner—signed on in May 1967. The station was a country music outlet, and the KEBC call sign was often referred to and became a monicker for the station known as "Keep Every Body Country" instead of the Electronic Broadcasting Company, broadcasting from studios at 3920 SE 104th Street on the city's southeast side; in 1970, the studios were moved to 830 SW 31st Street.^[12]

In 1971, Ralph Tyler and Harold McEwen bought a majority share in KEBC, and a new tower facility followed in 1973. KEBC established itself as a force in the market; it pulled double-digit ratings in each year between 1979 and 1982, fighting with KKNG and KTOK for the top spot in Oklahoma City.^[13] However, KEBC gained a formidable competitor on May 27, 1982, when KXXY-FM flipped to country.^[14] The more aggressive KXXY-FM edged ahead of KEBC in 1983 and would widen its lead to eight ratings points by the end of the decade.^[13]

While KXXY-FM surged, KEBC was sold several times. Van Wagner Broadcasting, which only owned two outlets in Michigan, bought the station from Ralph Tyler for $4 million in 1986.^[15] Two years later, Van Wagner sold KEBC to Independence Broadcasting for $3.9 million.^[16] Independence would see a return on its investment when Clear Channel Communications, forerunner to iHeartMedia, acquired KEBC for $7.5 million in 1993.^[17]

Alternative rock: 1996-1997

After 28 years in the country format, KEBC relaunched on July 8, 1996 as an alternative rock station known as "95X", adopting the call sign KNRX.^[18] It was the market's first station in the format.

Soft adult contemporary: 1997-2002

However, less than 18 months later, another change came. On November 7, 1997, after repeating the song "A Change Would Do You Good" by Sheryl Crow for an hour, KNRX became soft adult contemporary KQSR, seeking to target the 35–44 audience and citing the duplication of alternative music on stations in other formats in Oklahoma City.^[19]

Alternative rock: 2002-2008

The station returned to alternative on July 8, 2002 and became KHBZ-FM "The Buzz", stunting beforehand with a buzzing noise played over the soft rock songs and notifying listeners that their "technicians were working to get 'the Buzz' out".^[20] Starting with the 2006-07 NBA Basketball season, KHBZ-FM also served as the flagship station for the New Orleans/Oklahoma City Hornets Basketball team, replacing sister station KTOK that served as the Hornets flagship station for the 2005-06 NBA season.

Active rock: 2008-2009

On January 11, 2008, at 5 p.m., the station began stunting with all-Metallica, relaunching the following Monday with an active rock format. Despite a format emphasizing active rock and some classic rock titles, KHBZ-FM was still placed on the alternative rock panel by Radio & Records/Nielsen BDS.

By the spring of 2009, KHBZ-FM had adopted Clear Channel's syndicated Premium Choice active rock format, becoming musically identical outside of morning drive to sister stations KIOC in Beaumont, Texas and WHRL in Albany, New York.

Classic/mainstream rock: 2009-2021

On December 29, 2009, KHBZ-FM flipped to 1980s-based classic rock, branded as "The Brew." With the flip, the station changed its call sign to KBRU. The station's initial slogan was "Classic Rock's Next Generation".

Since adopting the "Brew" moniker, KBRU shifted between rock formats on several occasions. In 2012, the station began playing more recent titles, bringing it closer to the music mix heard on the former KHBZ-FM; later in the year, the station added more classic rock titles, eventually moving fully to classic rock as a competitor to KQOB. Since 2015, when the station moved back to mainstream rock, KBRU had oscillated between classic and mainstream rock formats.

Sports: 2021-2023

On August 18, 2021, at 6 a.m., after playing "The End" by The Doors, KBRU flipped to sports, branded as "94.7 The Ref", under new a KREF-FM call sign.^[21][22] For overnight programing, the station simulcast Fox Sports Radio along with other sports stations in the Oklahoma City radio market, including sister station KGHM, KREF in Norman (which the station simulcast as part of a partnership and affiliation between iHeart Oklahoma City and their owner Metro Radio Group), and KZLS in Enid.

The Oklahoma City Dodgers Triple-A West Minor League baseball team affiliate of the Los Angeles Dodgers baseball team broadcast some select games on KREF-FM, specifically those conflicting with college football game broadcasts and other events on AM sister station KGHM 1340 The Game, the team's primary radio station.

KREF-FM, along with the other iHeart stations in Oklahoma City, simulcasts audio of KFOR-TV if a tornado warning or other disasters are issued within the Oklahoma City metro viewing area.

Classic rock: 2023-present

On August 7, 2023, iHeart Oklahoma City announced it would end the KREF-FM partnership and affiliate with Metro, and the station would change to a different format at 6 p.m. on August 18 (exactly two years to the day after launch).^[23] While KREF-FM still retained the sports talk format after that time, it would drop all Metro-sourced programs and run Fox Sports Radio programming full-time as an interim move.

On October 31, 2023 at midnight, KREF-FM dropped the sports talk format and, after playing the Jimi Hendrix cover of "The Star-Spangled Banner" and an old station identification from the station's time under the KBRU call sign, flipped to classic rock as "Q94.7", under a new KOKQ call sign. The station launched with a "Two-For Tuesday", playing sets of two consecutive songs from the same artists all day, starting with "Here I Go Again" and "Is This Love" both by Whitesnake, and featured WFBQ Indianapolis host Dave "Gunner" Gunn in mornings. The move brought a full-fledged classic rock format back to the area for the first time since KRXO 107.7 had dropped the format from its main signal in 2013.^[24] Ironically, KRXO flipped to sports radio, the same format KOKQ gave up to begin playing classic rock.