The station signed on April 1, 2008, as KLCX, with a classic hits format; the format and call sign were moved from 107.7 FM, which was converted to active rock station KDZZ, "Z-Rock 107.7". On March 23, 2010, the station changed its call letters to KDCZ and began simulcasting KDZZ.
On August 30, 2013, a deal was announced in which Townsquare would acquire 53 Cumulus Media stations, including KDZZ/KDCZ, for $238 million. The deal was part of Cumulus' acquisition of Dial Global; Townsquare and Dial Global were both controlled by Oaktree Capital Management.[2][3] The transaction was consummated effective November 14, 2013.
On April 13, 2017, at 7:30 a.m., KDCZ split from its simulcast with KDZZ and changed its format to adult hits, branded as "103.9 The Doc".[4] On May 16, 2017, KDCZ changed its call letters to KDOC-FM; the KDCZ call letters moved to KDZZ on June 2, 2017.
On September 10, 2021, KDOC-FM flipped to a simulcast of classic hits-formatted sister station KFNL-FM, branded as "Fun 104".[5]
