Internet Providers in South San Francisco

South San Francisco has multiple fiber providers, including AT&T and Sonic Telecom. Symmetric speeds of 5,000 Mbps are available in parts of the city.

Fiber

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
AT&T	5,000	5,000	99%
Astound	1,500	1,500	12%
Sonic Telecom	1,000	1,000	57%

Cable

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Xfinity	2,000	250	100%
Astound	1,500	50	62%

DSL

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Sail Internet	1,000	1,000	9%

Fixed Wireless

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Etheric Networks	250	100	100%
Unwired Ltd	300	25	38%
Verizon	300	20	99%
Sail Internet	200	100	10%
MINTernet	100	20	100%
T-Mobile	100	20	100%

Next-Gen Satellite

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Starlink	280	30	100%

Old-School Satellite

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
HughesNet	100	5	100%
Viasat	100	3	100%

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Low-Availability Internet Options

Provider	TechnologyTech	Download (Mbps)	Upload (Mbps)	AvailabilityCoverage
Astound	DSL/CopperDSL	1,000	10	0.1%
AT&T	Fixed WirelessFixed Wireless	100	20	0.4%

Broadband Map's availability estimates are based on the census boundaries of South San Francisco. Speed metrics capture internet providers' maximum advertised speeds. Both may be overoptimistic.

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Data Sourcing

Broadband Map's listings of internet providers in South San Francisco rely primarily on the November 2025 release from the FCC's Broadband Data Collection program (representing South San Francisco ISPs' availability as of June 2025).