AT&T internet in San Mateo, CA
AT&T reports service to about 93% of residential locations in San Mateo, California, which ranks it #2 of 9 providers with meaningful coverage. AT&T sells home internet over fiber (AT&T Fiber), older DSL lines, and a fixed wireless service called Internet Air. Which one you can get depends on your address, and fiber is only available in parts of its footprint.
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How AT&T compares in San Mateo
| # | Provider | Technology (varies by address) | Locations covered |
|---|---|---|---|
| 1 | Xfinity | Cable | 99% |
| 2 | AT&T | Fiber, DSL, Fixed wireless | 93% |
| 3 | Astound Broadband | Fiber, Cable | 82% |
| 4 | T-Mobile Home Internet | Fixed wireless | 74% |
| 5 | Etheric Communications | Fixed wireless | 69% |
| 6 | Verizon | Fiber, Fixed wireless | 55% |
| 7 | Sonic Telecom | Fiber | 30% |
| 8 | Unwired | Fixed wireless | 22% |
Share of residential locations in San Mateo where each provider reports service (FCC National Broadband Map, data as of December 31, 2025). See all providers in San Mateo.
AT&T vs other providers
What technologies are available in San Mateo?
Fiber is widely available: about 71% of locations in San Mateo can get it. Gigabit-class service (1,000 Mbps down) is reported for about 99%+ of locations. DSL is still reported for about 30% of locations, which can be a fallback where fiber and cable do not reach. Fixed wireless home internet is reported for about 93% of locations.
FCC National Broadband Map, data as of December 31, 2025: share of residential locations in San Mateo that providers report they can serve. City-level figures, not your address.
AT&T in places near San Mateo
- Foster City, CA (84%)
- Belmont, CA (89%)
- Burlingame, CA (94%)
- San Carlos, CA (96%)
- Millbrae, CA (97%)
- Redwood City, CA (93%)
- South San Francisco, CA (93%)
- San Bruno, CA (91%)
Plans and pricing
Plan prices and promotions change often and vary by address, so we do not list them. See AT&T's current offers at your address with its availability checker above.
Frequently asked questions
Is AT&T available in San Mateo?
AT&T reports service to about 93% of residential locations in San Mateo, per FCC data as of December 31, 2025. That ranks it #2 of 9 providers with meaningful coverage here. Availability depends on your exact address.
What type of internet does AT&T offer in San Mateo?
AT&T offers fiber, dsl, fixed wireless service across its footprint. The FCC summary does not say which technology reaches each address, so check your address with the provider.
Who are the main AT&T competitors in San Mateo?
Other providers reporting at least 10% coverage in San Mateo include Xfinity (99%), Astound Broadband (82%), T-Mobile Home Internet (74%), Etheric Communications (69%).
How do I check AT&T availability at my address?
Use AT&T's own address checker, or enter your ZIP code here to compare all providers for your area.
Compare all providers for your ZIP code
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