KOKO originally signed on the air as a country station known as "KTAA" during the early 1980s. In the early 90s the format changed to an all hip hop station known as "Jammin 94". It didn't last long, eventually flipping the format again, this time to a Regional Mexican Station known as "La Fiesta" (The Party). But in 1997, Victor Brown bought the station and it flipped to a hip hop and R&B station known as "94.3 The Party". Laboe bought the station in 1998 and dabbled with quite a few different formats to keep up with ratings, which were hard to come by in a tough Fresno market, but finally found its current format which is now "Hit Radio 94.3" which plays a mix of Art Laboe's trademark "Killer Oldies", to a mix of adult contemporary music.
On June 28, 2012 KOKO shifted their format to classic hits.