KOSF

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KOSF

San Francisco, California
Broadcast area	San Francisco Bay Area
Frequency	103.7 MHz (HD Radio)
Branding	Classic Hits 103.7
Programming
Format	Classic hits
Subchannels	HD2: Sports and conservative talk (KNEW simulcast)
Affiliations	Premiere Networks
Ownership
Owner	iHeartMedia (iHM Licenses, LLC)
Sister stations	KIOI, KISQ, KKSF, KMEL, KNEW, KYLD
History
First air date	November 3, 1947; 77 years ago (1947-11-03)
Former call signs	KGO-FM (1947–1971) KSFX (1971–1982) KGO-FM (1982–1984) KLOK-FM (1984–1987) KKSF (1987–2012)
Call sign meaning	"Oldies San Francisco" (previous format)
Technical information[1]
Licensing authority	FCC
Facility ID	65484
Class	B
ERP	6,400 watts
HAAT	403 meters (1,322 ft)
Transmitter coordinates	37°41′17″N 122°26′10″W / 37.688°N 122.436°W / 37.688; -122.436
Repeater(s)	103.7 KOSF-FM2 (Pleasanton)
Links
Public license information	Public file LMS
Webcast	Listen live (via iHeartRadio)
Website	classichits1037.iheart.com

KOSF (103.7 FM) is a commercial radio station licensed to San Francisco, California. It airs a classic hits radio format and is owned by iHeartMedia, Inc. KOSF's studios are on Townsend Street in San Francisco's SoMa district.

KOSF has an effective radiated power (ERP) of 6,400 watts. Its transmitter is located on Colma Road atop San Bruno Mountain in Brisbane.^[2] KOSF broadcasts using HD Radio technology.