Founded by Gordon Zlot, KZST was long-time operated under the ownership of his company, Redwood Empire Stereocasters. In morning drive time, Brent Farris had broadcast his "Morning Showgram" for more than 25 years, the longest current tenure of any radio host in Sonoma County, with multiple co-hosts assisting him over that span of time. Farris has since retired after a radio career that spanned 47 long years. Debbie Abrams, Farris's very last co-host leading up to his retirement, now is the sole host of the KZST morning show. Sue Hall and Mike Adams cover the KZST afternoon time slots. Jim Grady, the weekend morning host, held that distinction until March 26, 2004, when he was released from news/talk station KSRO after 44 years. KZST for a number of years aired two syndicated radio shows hosted by Dick Clark, Rock, Roll, and Remember was on Saturday nights, and Countdown America was on Sunday mornings.
The KZST-FM studios and offices
"Jazzy 93.7" KJZY shared the same building and ownership.
In June 2022, it was announced that KZST and sister stations KWVF, K256DA, and K273CU would be sold by Redwood Empire Stereocasters to Amaturo Sonoma Media Group for $6 million.[7][8] The sale was consummated on December 1, 2022.
