KSFO

KSFO
Broadcast areaSan Francisco Bay Area
Frequency810 kHz
Branding810 KSFO
Programming
FormatConservative talk
Affiliations
Ownership
Owner
History
First air date
January 8, 1924 (1924-01-08)
Former call signs
KGO (1924–2024)
Call sign meaning
San Francisco
Technical information
Licensing authority
FCC
Facility ID34471
ClassA
Power50,000 watts (unlimited)
Transmitter coordinates
37°31′35″N 122°6′2″W / 37.52639°N 122.10056°W / 37.52639; -122.10056
Links
Public license information
WebcastListen live
Websitewww.ksfo.com

KSFO (810 AM) is a commercial radio station licensed to San Francisco, California, featuring a conservative talk radio format. Owned by Cumulus Media, KSFO's studios are on Battery Street in the SoMa portion of San Francisco's Financial District. KSFO used the call sign KGO from 1924 to 2024.

KSFO's transmitter site is in Fremont, near the Dumbarton Bridge, where its prominent towers are used by pilots as a landmark when navigating. KSFO broadcasts with 50,000 watts, the highest power permitted for AM stations by the Federal Communications Commission (FCC). It uses a directional antenna with a three-tower array. Most of its signal is sent north and south to avoid interfering with the other Class A station on 810 AM, WGY in Schenectady. Most nights, using a good radio, KSFO can be heard throughout the Western United States and Western Canada. Due to its extensive groundwave signal, its daytime coverage extends into many areas of Northern California.