iHeartMedia Registers New Domains for KOSF Rebrand
The radio giant secured two new web addresses, suggesting a potential shift in branding for the San Francisco station.
Updated on Oct. 25, 2026 in Music — General
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iHeartMedia recently registered two domain names, GreatestHits1037.com and TheBaysGreatestHits.com, which currently redirect to the KOSF radio station website. These registrations hint that the station could be preparing for yet another brand identity refresh.
Why it matters
KOSF has frequently changed its branding to maintain listener engagement in a competitive radio market, with seven different identities adopted since 2011. A new name could signal an effort to stabilize or grow its current audience share in the Bay Area.
KOSF recorded a 2.5 share in San Francisco and a 3.9 share in San Jose during the September 2026 Nielsen Audio ratings period. The station has cycled through seven distinct brands since 2011, often utilizing variations of its current positioning statement.
The players
iHeartMedia
This global media and entertainment company operates over 800 live broadcast stations across the United States.
KOSF
This San Francisco radio station broadcasts on the 103.7 frequency and currently serves as a classic hits outlet.
The details
The newly registered domains, GreatestHits1037.com and TheBaysGreatestHits.com, align closely with the station's existing on-air positioning. These redirects suggest that the station is evaluating how best to present its classic hits format to listeners in the San Francisco and San Jose markets.
Timeline
The station first rebranded to Oldies 103.7 in April 2011.
A rebranding to Big 103.7 occurred in May 2014.
The format narrowed to all-1980s music in June 2016.
The station rebranded to 103.7 80s Plus in May 2021.
Nielsen Audio ratings for the station were measured in September 2026.
Industry Dynamics
Radio stations often leverage domain registrations and rebrands to boost visibility in the competitive Nielsen Audio market ratings cycles. This strategy reflects a broader trend of stations constantly iterating their identity to secure local advertising and listener retention.
Listeners can continue to tune in to 103.7 FM for current programming while awaiting further announcements regarding a possible name change. No immediate changes to the station's music format or broadcast schedule have been announced at this time.
The takeaway
Radio stations frequently update their branding to maintain relevance within shifting local market demographics. Listeners interested in the station's direction can monitor future announcements for potential changes to the on-air lineup or format.
Further reading
For more on the local broadcasting landscape, explore Music — General updates.
Source note: This article includes information reported by RadioInsight.
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