California · County profile
Internet providers in Contra Costa County, CA
Xfinity, AT&T, Unwired Ltd. and 2 other providers report service to most homes in Contra Costa County; 3 more providers report service in some areas. Satellite service is available almost everywhere.
Check what's available at your address
Type your ZIP code to see the providers reported near you in Contra Costa County. Then call to confirm plans at your exact address.
Or call and we check for you
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Who serves this area
Providers that serve Contra Costa County
Each card says whether the provider reports service to most homes here or only in some areas. Many homes can choose more than one provider; call to check plans and prices at your address.
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XfinityCable
Available
Reports service to most homes in Contra Costa County.
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AT&T
Available
Reports service to most homes in Contra Costa County.
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Unwired Ltd.
Available
Reports service to most homes in Contra Costa County.
Call to check plans and price (815) 934-8169 -
T-MobileFixed wireless
Available
Reports service to most homes in Contra Costa County.
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Verizon
Available
Reports service to most homes in Contra Costa County.
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AstoundCable
Available in some areas
Reports service to part of Contra Costa County; check your street.
Call to check plans and price (815) 934-8169 -
Sonic
Available in some areas
Reports service to part of Contra Costa County; check your street.
Call to check plans and price (815) 934-8169 -
Etheric Communications, LLC.
Available in some areas
Reports service to part of Contra Costa County; check your street.
2 more providers report smaller service areas; see the table.
Available almost everywhere satellite, shown separately
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HughesnetSatellite
Available almost everywhere by satellite
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ViasatSatellite
Available almost everywhere by satellite
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StarlinkSatellite
Available almost everywhere by satellite
Show all 13 providers as a table
| Provider | Availability | Main technology | Company |
|---|---|---|---|
| Xfinity | Available | Cable | Comcast Corporation |
| AT&T | Available | Not specified | AT&T Inc. |
| Unwired Ltd. | Available | Not specified | Unwired Ltd. |
| T-Mobile | Available | Fixed wireless | T-Mobile USA, Inc. |
| Verizon | Available | Not specified | Verizon Communications Inc. |
| Astound | Available in some areas | Cable | Radiate Holdings, LP |
| Sonic | Available in some areas | Not specified | Sonic Telecom, LLC |
| Etheric Communications, LLC. | Available in some areas | Not specified | Etheric Communications, LLC. |
| GeoLinks | Reported for a few homes only | Not specified | California Internet |
| Sail Internet Holdings LLC | Reported for a few homes only | Not specified | Sail Internet Holdings LLC |
| Hughesnet | Available almost everywhere (satellite) | Satellite | EchoStar Corporation |
| Viasat | Available almost everywhere (satellite) | Satellite | Viasat, Inc. |
| Starlink | Available almost everywhere (satellite) | Satellite | Space Exploration Technologies Corp. |
Source: FCC National Broadband Map, provider filings as of December 30, 2025 · How we use the data
Town by town
Towns and cities in Contra Costa County
| Town | Locations | Providers |
|---|---|---|
| Acalanes Ridge | 613 | 11 |
| Alamo | 8,142 | 10 |
| Antioch | 41,687 | 8 |
| Bay Point | 7,232 | 8 |
| Bethel Island | 1,528 | 8 |
| Blackhawk | 4,840 | 9 |
| Brentwood | 26,979 | 9 |
| Camino Tassajara | 1,780 | 9 |
| Clayton | 4,310 | 8 |
| Concord | 49,536 | 10 |
| Contra Costa Centre | 5,168 | 9 |
| Crockett | 1,866 | 7 |
| Danville | 18,198 | 9 |
| Diablo | 785 | 9 |
| Discovery Bay | 6,843 | 8 |
| East Richmond Heights | 1,459 | 9 |
| El Cerrito (city) | 12,090 | 10 |
| El Sobrante (CDP) | 5,870 | 9 |
| Hercules | 8,350 | 8 |
| Kensington | 2,433 | 10 |
| Lafayette | 12,861 | 9 |
| Martinez | 16,142 | 9 |
| Montalvin Manor | 897 | 9 |
| Moraga | 5,944 | 9 |
| Mountain View (CDP) | 1,062 | 9 |
| North Richmond | 1,349 | 8 |
| Oakley | 15,761 | 8 |
| Orinda | 9,050 | 9 |
| Pacheco | 1,852 | 9 |
| Pinole | 7,647 | 9 |
| Pittsburg | 26,875 | 8 |
| Pleasant Hill | 15,135 | 9 |
| Reliez Valley | 1,522 | 9 |
| Richmond | 42,384 | 10 |
| Rodeo | 3,242 | 8 |
| Rollingwood | 768 | 8 |
| San Miguel (CDP) | 1,443 | 11 |
| San Pablo | 10,110 | 10 |
| San Ramon | 29,629 | 10 |
| Saranap | 2,362 | 10 |
| Tara Hills | 1,823 | 9 |
| Vine Hill | 1,637 | 9 |
| Walnut Creek | 37,127 | 11 |
Where this comes fromFCC filings and how to check one address
Check service at your address
The figures on this page summarize what providers reported to the FCC for all homes in Contra Costa County. They do not confirm that any provider serves a particular address, and providers' reports can overstate coverage. Two ways to check your own address:
- Search your address on the FCC National Broadband Map.
- Call (815) 934-8169 and we will look up the providers and plans available at your address. We are an independent service, not your provider.
Sources
Provider availability comes from the FCC National Broadband Map (provider filings as of December 30, 2025): a provider is "available" where its filing covers most homes and "available in some areas" where it covers part of them. Household counts come from the Census Bureau's American Community Survey (ACS 5-year 2020-2024), which are estimates with margins of error.
- FCC National Broadband Map — Broadband Data Collection public data (D25 filing, released 2026-09-29). Data as of December 30, 2025; retrieved October 9, 2026.
- U.S. Census Bureau, American Community Survey 5-year 2020-2024 estimates (tables B01003, B25001, B19013, B28002). Data as of ACS 5-year 2020-2024; retrieved October 9, 2026.
- U.S. Census Bureau 2024 Gazetteer Files (town locations) and 2020 Census block files (which county each town lies in). Data as of January 1, 2024 boundaries (Gazetteer); 2020 Census blocks; retrieved October 9, 2026.
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