KOST

KOST
Los Angeles, California;
Broadcast area	Greater Los Angeles
Frequency	103.5 MHz (HD Radio)
Branding	KOST 103.5
Programming
Format	Adult contemporary
Subchannels	HD2: KFI simulcast (News/Talk);
Ownership
Owner	iHeartMedia; (iHM Licenses, LLC);
Sister stations	KBIG; KEIB; KFI; KIIS-FM; KLAC; KRRL; KSRY; KVVS; KYSR;
History
First air date	1957 (as KGLA)
Former call signs	KFSG-FM (CP, 1956-1957); KPUL (CP, 3/6/1957-3/20/1957); KGLA (1957–1966); KADS (1966–1968);
Call sign meaning	Sounds like the word "coast", as in the West Coast or Pacific Coast
Technical information
Licensing authority	FCC
Facility ID	34424
Class	B
ERP	11,500 watts
HAAT	949 meters (3,114 ft)
Transmitter coordinates	34°13′35.3″N 118°4′0.9″W / 34.226472°N 118.066917°W
Translator(s)	See § Translators and booster
Links
Public license information	Public file; LMS;
Webcast	Listen live (via iHeartRadio); HD2: Listen live (via iHeartRadio);
Website	kost1035.iheart.com

KOST (103.5 FM) is a commercial radio station in Los Angeles, California, United States. Owned by iHeartMedia, it broadcasts an adult contemporary radio format, switching to Christmas music in early November and ending on Christmas Day. Its studios are co-located with its sister stations on West Olive Avenue in Burbank. KOST is the home of Ellen K, segments of whose morning show are syndicated to other iHeart AC stations on Saturday mornings.

The transmitter is atop Mount Wilson alongside most L.A. based television and FM radio stations.^[2] Those FM stations, along with KOST, are considered "superpower" grandfathered stations, since their effective radiated power (ERP) greatly exceeds the level set by the Federal Communications Commission for Class B FM stations at their height on Mount Wilson. KOST broadcasts using HD Radio technology.^[3] The HD2 digital subchannel rebroadcasts co-owned talk radio station KFI 640 AM. The HD3 subchannel formerly carried the iHeart soft adult contemporary format, "The Breeze." The HD3 subchannel has since been turned off.