Coverage · California
Internet providers in California
168 internet providers serve California across 1,661 ZIP codes, with fiber filed in 74% of them. Compare the largest providers, browse coverage by city, then check your exact address.
How coverage really works
Two houses on one street can get different answers.
Providers file availability by location, and we summarize those filings up to ZIP level. It tells you who reports serving the area — the provider confirms your own address when you order.
Largest internet providers in California
Ranked by the number of California ZIP codes each provider reports serving.
| Provider | ZIP codes served | Top filed speed |
|---|---|---|
| T-Mobile Home Internet | 1,527 | 100 Mbps |
| AT&T Internet Air | 1,422 | 100 Mbps |
| Verizon 5G Home | 1,381 | 1 Gbps |
| AT&T Fiber | 848 | 5 Gbps |
| Spectrum | 644 | 1 Gbps |
| Xfinity | 533 | 2 Gbps |
| Frontier Fiber | 390 | 7 Gbps |
| unWired | 289 | 1 Gbps |
| Spectrum Fiber | 265 | 1 Gbps |
| Cal.net | 235 | 1 Gbps |
Coverage by city in California
Other states
Coverage data: FCC Broadband Data Collection (December 2024) — broadbandmap.fcc.gov. Availability is address-specific within each ZIP code. Satellite internet is sold nationwide, but each install has to qualify on site — a clear view of the sky and a place to mount the dish.