KNBR is a AM radio station in San Francisco, California, broadcasting on a clear channel from transmitting facilities in Redwood City, California. KNBR's non-directional 50,000-watt class-A signal can be heard throughout much of the western United States and as far west as the Hawaiian Islands at night. For several decades, KNBR enjoyed a long history as the flagship station of NBC's West Coast radio operations.

KNBR-FM is a commercial radio station licensed to San Francisco, California, serving the greater San Francisco Bay Area. Owned by Cumulus Media, KNBR-FM features a sports radio format in a simulcast with co-owned KNBR. Both stations are the San Francisco affiliates for Infinity Sports Network, the flagship stations for the San Francisco Giants Radio Network and co-flagship stations for the San Francisco 49ers Radio Network. KNBR-AM-FM are the radio home of Greg Papa and Tom Tolbert.