On April 1, 1963, KUFYsigned on the air. It was the FM counterpart of KOFY, owned by Intercontinental Radio, Inc. While the AM station aired a Regional Mexican format, KUFY played beautiful music, mostly instrumental cover versions of popular songs along with Hollywood and Broadway showtunes. Because KUFY played easy listening music, the call sign changed to KVEZ in 1968.
KSOL
In 1975, the station flipped to an urban contemporary format and took the call letters KSOL for "K-Soul." The original K-Soul broadcast on 1450 AM. KSOL became the first urban radio station on the FM dial in the San Francisco Bay Area. Local musician Sly Stone played a part in influencing the station to make the switch. While KSOL managed to fend off competition from KBLX unscathed throughout the 1980s, KSOL's ratings began to decline due to competition from KMEL, then a Top 40 station which was slowly evolving in a rhythmic contemporary format before going in a mainstream urban direction. Eventually, the decision was made to end KSOL and its format. The DJs were notified beforehand and held a goodbye show to send off KSOL on February 10, 1992. The final song on KSOL was "Miss You Much" by Janet Jackson. Afterwards, KSOL segued into a 72-hour loop of "Wild Thing" by Tone Lōc.
KYLD
On February 13, 1992, at 3 p.m., 107.7 FM flipped to Rhythmic Contemporary, branded as "WiLD 107." The first song on "WiLD" was "D.M.S.R" by Prince. For the first year and a half, the station retained the old KSOL call letters. Allen Shaw's Crescent Communications bought the station in December 1993 for $13.5 million. KSOL's call letters were changed to KYLD the following year. The company also purchased 99.1 in San Jose from Viacom, and began simulcasting KYLD's programming in the South Bay, in order to help fill 107.7's signal limitations. Program Director Rick Thomas and Music Director Michael Martin set a plan in motion to overtake KMEL; they came up with a strategy of playing "old school" and up tempo freestyle/dance songs like those heard on heritage San Jose radio station HOT 97.7. KMEL moved from rhythmic to urban contemporary at the same time, and the two stations battled with each other throughout the mid-1990s.
KSAN
At 12:01 a.m. on July 2, 1997, KYLD moved to 94.9 FM. 107.7 and 94.9 would simulcast until Midnight on July 7, when 107.7 FM, now with the KSAN call letters, began stunting with construction noises and song clips as a prelude to a flip to classic rock at Noon on July 11. On March 13, 2000, at 3 p.m., after playing "Goodbye Yellow Brick Road" by Elton John, the station relaunched as "The Bone," playing classic rock with a harder edge. To initiate this change, the station played AC/DC "A to Z," all 154 songs the band had recorded at that point, aired in alphabetical order.
Throughout the NFL season, the station broadcasts San Francisco 49ers games. While co-owned KNBR and KTCT are the primary flagship stations for the team, KSAN also airs the games.
Booster
KSAN is rebroadcast on the following FM Booster:
HD Radio
KSAN broadcasts in the HD Radio format with the following stations: