On February 20, 2009 the switch from "97.1 FM Talk" of hot talk format to "97.1 AMP Radio" of Contemporary Hit Radio format, which is the rival playing as KIIS-FM at the same time. On June 30, 2009 the call letters changed to KAMP, then later KAMP-FM on July 7, 2009.
2012–2013[]
2013–2016[]
2016–2018[]
2018–2020[]
2020–2021[]
KNOU[]
April 15–December 6, 2021[]
KNX-FM[]
December 6, 2021–present[]
On December 6, 2021, Audacy announced that KNOU will be converted into a simuilcast of KNX. The station's call letters were renamed on December 21 to KNX-FM. The move also leaves KIIS-FM as the only Top-40 station in the Los Angeles Area.
1Owned by Audacy, but operated by Bloomberg L.P. pursuant to a time brokerage agreement. 2Owned by Paramount Global, but operated by Audacy under a CBS Brands License Agreement as a producer with distribution handled by Westwood One. 3Co-owned with Pegula Sports and Entertainment. 4Owned by Martz Communications Group, but operated by Audacy under a local marketing agreement.