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.
KPO and KGO building in the 1940s.