Owned by Cumulus Media, KNBR-FM features a sports radio format in a simulcast with co-owned KNBR.

KNBR maintains studios on Battery Street in San Francisco, while the transmitter is located on Mount Sutro.

It aired a "good music" format, mostly instrumental easy listening with some middle of the road songs and soft pop vocals.

Within a few years, KFOG got competition from other beautiful music stations: KABL-AM-FM (now KNEW and KISQ) and from KOIT, as well as San Jose-based KBAY (now KBRG).

[6][7] The station featured a wide range of music, from the psychedelic sounds of the Grateful Dead and Jefferson Airplane to newer artists such as Prince, the Eurythmics, and the Thompson Twins.

KFOG avoided commercial-sounding bands such as Loverboy and REO Speedwagon, which were widely played on more mass-appeal AOR stations at the time.

On August 26, 2019, Cumulus announced that KFOG would drop its rock format on September 6 to simulcast sister station KNBR.

The exception was the 8 a.m. hour, a repeat of Dave Morey's final morning show before his retirement in 2008, and the 5 p.m. hour, in which KFOG paid tribute to longtime DJ Mike 'M Dung' Slavko's Sunday night freeform radio program "The Idiot Show".

[15] In the station's final hour as KFOG, they rebroadcast the audio of its 1982 flip to AAA, followed by a "10@10" broadcast of "666 - Day of Doom Devil Music" which originally aired June 6, 2006, and ended with a short set of songs, finishing with "Brokedown Palace" by the Grateful Dead.

After a final sign-off consisting of an eight-minute-long loop of ocean wave, seagull, and foghorn sound effects that were the station's longtime audio trademark, and a minute of silence, KFOG officially flipped to the simulcast.