KIOI

KIOI (101.3 FM, "Star 101.3") is a radio station licensed to San Francisco, California. The iHeartMedia, Inc.-owned station programs a Hot Adult Contemporary format. The station transmits its signal from San Bruno Mountains, while studios are located in the SoMa district of San Francisco.

KLX-FM

Originally founded as KLX-FM by the Oakland Tribune newspaper, the station began broadcasting May 3, 1948, on 101.3 MHz, simulcasting sister station KLX-AM's programming 17 of the 18 hours it was on daily.

KPEN

It was sold in 1957 to James Gabbert, a Stanford University engineering major, fellow student Gary M. Gielow, and realtor John S. Wickett. The three launched the station as KPEN on October 27, 1957. At the time, KPEN was a Peninsula station licensed to Atherton, California, broadcasting at a mere 1500 watts from a transmitter on Kings Mountain in the Santa Cruz Mountains. The station soon put an emphasis on high audio quality, in contrast to other FM stations that did not take advantage of FM broadcasting capabilities.