The station was assigned the call sign KLSN by the Federal Communications Commission on May 1, 1998. It changed its call sign to KJOL on December 26, 2000, to KSRI on April 23, 2001, and to KSQD on December 18, 2018.[1]
Natural Bridges acquired KSRI from Educational Media Foundation in May 2018. EMF had operated KSRI as an Air1 affiliate. Natural Bridges included several hosts from KUSP, a defunct public radio station in Santa Cruz.[4] KSQD would expand its coverage to the Monterey-Salinas area in 2023, acquiring KNVM 89.7 FM, and its translator K208GE 89.5 FM. The extended coverage launched on June 17, and KNVM's call sign was changed to KSQT on June 24, 2023.[5][6]