It is owned and operated by the Ion Media subsidiary of the E. W. Scripps Company, and maintains offices on Prospect Park Drive in Rancho Cordova; its transmitter is located at TransTower in Walnut Grove, California.
The station first signed on the air on August 27, 1990, as KCMY; it originally operated as the area's Home Shopping Club affiliate[2] before joining the InfoMall TV network in 1995.
In 1995, then-CBS affiliate KXTV agreed to provide some programming to KCMY in order to give it more of a competitive edge in the Sacramento market.
Paxson Communications (now Ion Media) purchased the station in 1998, changing its call sign to KSPX.
The station's signal is multiplexed: KSPX shut down its analog signal, over UHF channel 29, on June 12, 2009, as part of the federally mandated transition from analog to digital television.