High Quality Content by WIKIPEDIA articles! KNSD, channel 39, is an owned-and-operated television station of the NBC Television Network, located in San Diego, California, USA. KNSD maintains studios at the NBC Building in downtown San Diego, and its transmitter is located southeast of Spring Valley in San Diego County; master control and local commercial insertion is handled at NBC`s West Coast headquarters in Burbank. The station is known on-air as NBC 7 San Diego, derived from KNSD`s cable channel position in the market on the cable systems serving the San Diego area (Time Warner Cable, Cox Communications and AT&T U-verse).