103.7 KOSF Eyes Potential Rebrand
The station registered new web domains as it considers an update to its current branding.
Updated on Oct. 25, 2026 in Music — General
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Listeners of 103.7 KOSF may soon see a fresh identity for the long-running station. iHeartMedia recently registered two web domains that suggest a potential new brand name for the frequency.
Why it matters
Changes at the station affect the local radio landscape for long-time listeners across the Bay Area. Since the station has cycled through seven different brands since 2011, a new shift would follow its history of periodic identity updates.
KOSF earned a 2.5 share in the San Francisco Nielsen Audio ratings for September 2026, compared to a 3.9 share in the San Jose market. Whether these figures signal a permanent shift in format or just a minor naming tweak remains unknown.
The players
iHeartMedia
The media conglomerate that owns and manages the broadcasting operations for KOSF.
KOSF
The 103.7 FM radio station serving San Francisco and San Jose listeners.
The details
iHeartMedia filed registrations for GreatestHits1037.com and TheBaysGreatestHits.com, both of which currently redirect to the existing KOSF station website. The station has historically adapted its image often, utilizing seven distinct brands since 2011. There is no official date for when these changes might take effect for local listeners.
Timeline
April 2011: Station rebranded to Oldies 103.7
May 2014: Station rebranded to Big 103.7
June 2016: Station narrowed format to all-1980s music
May 2021: Station rebranded to 103.7 80s Plus
September 2026: Nielsen Audio ratings period for KOSF
Across the Bay
This potential rebrand follows a long-standing pattern for the station, which has updated its identity seven times since 2011. It mirrors the 2021 shift to 103.7 80s Plus, continuing the station's history of frequent format and branding refreshes.
If you tune in to 103.7 on your daily commute, you may notice new branding appearing on your radio display or website soon. No change to the current broadcast frequency or content has been announced yet.
The takeaway
The station has maintained a classic hits variation for 15 years despite its shifting brand names. Monitor the 103.7 frequency in the coming weeks to see if the new domain names lead to an official station launch.
Further reading
Keep up with local broadcast shifts in the Music — General section.
Source note: This article includes information reported by RadioInsight.
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