Compare cell coverage in Contra Costa County, CA

See the best cell service provider in Contra Costa County with our network coverage comparison of AT&T, Verizon, and T-Mobile. Use the search box to see cell coverage down to a street address.

FCC data as of June 30, 2022, updated November 18, 2022

AT&T has 73% of Contra Costa County covered by 5G service and 82% covered by 4G LTE service.

73%

covered by 5G

82%

covered by 4G LTE

Amount of Contra Costa County covered:: 82.5%
Excellent reception: 7.2%
Good reception: 20.3%
Average reception: 34.7%
Fair reception: 19.4%
Poor reception: 0.8%
No Signal: 17.5%

Verizon has 66% of Contra Costa County covered by 5G service and 85% covered by 4G LTE service.

66%

covered by 5G

85%

covered by 4G LTE

Amount of Contra Costa County covered:: 85.3%
Excellent reception: 30.7%
Good reception: 33.2%
Average reception: 16.6%
Fair reception: 4.6%
Poor reception: 0.1%
No Signal: 14.7%

T-Mobile has 53% of Contra Costa County covered by 5G service and 78% covered by 4G LTE service.

53%

covered by 5G

78%

covered by 4G LTE

Amount of Contra Costa County covered:: 78.2%
Excellent reception: 17.0%
Good reception: 31.1%
Average reception: 28.2%
Fair reception: 1.9%
No Signal: 21.8%

Coverage data: FCC National Broadband Map

Coverage over time

FCC data as of	AT&T 4G / 5G	Verizon 4G / 5G	T-Mobile 4G / 5G
June 30, 2022	82% / 73%	85% / 66%	78% / 53%

Coverage over time

Cities in Contra Costa County