COSTA MESA · CA · FCC DATA

Best cell phone coverage in Costa Mesa Costa Mesa, California

AT&T, T-Mobile and Verizon all report outdoor coverage of 100% of Costa Mesa, CA, so no carrier wins on outdoor coverage here.

Carrier-reported coverage from FCC carrier filings as of December 31, 2025, not measured signal. How these figures are read

RESULT · COSTA MESA, CA

Coverage in Costa Mesa, CA

Population 109,131 (Census 2024 estimate)

What stands out in Costa Mesa

  • T-Mobile reports 99.4% of Costa Mesa in a moving car, against 26.8% of California as a whole.
  • Beyond the city limits it thins: across Orange County, T-Mobile reports 56.8% in a moving car, against 99.4% in Costa Mesa.
  • 5G at 35/3 Mbps covers 100% of Costa Mesa, against 47.7% of California.
✓ ALL THREE REPORT THE SAME
All three carriers
100%

AT&T vs T-Mobile vs Verizon in Costa Mesa

=
AT&T
Outdoor
100%
In car
100%
=
T-Mobile
Outdoor
100%
In car
99.4%
=
Verizon
Outdoor
100%
In car
98.3%

4G and 5G across all carriers in Costa Mesa

4G LTE
100%
5G 7/1
100%
5G 35/3
100%

Check your street on each carrier's map

AT&T coverage map → T-Mobile coverage map → Verizon coverage map →

Around Costa Mesa, in Orange County

The towns nearby where one carrier reports the least outdoors: Silverado (T-Mobile 8.7%), Rancho Mission Viejo (T-Mobile 66.4%), Laguna Beach (T-Mobile 85%), Brea (T-Mobile 91.5%).

Questions about coverage in Costa Mesa

Q1

How does Costa Mesa compare with the rest of California?

Outdoors AT&T 100% (state 57.3%), T-Mobile 100% (state 51.4%), Verizon 100% (state 64.3%); in a moving car AT&T 100% (state 36.2%), T-Mobile 99.4% (state 26.8%), Verizon 98.3% (state 33.6%).

ZIP codes mostly inside Costa Mesa

92626, 92627.

See the statewide California comparison, or coverage in Irvine, Santa Clarita, Fremont, Huntington Beach, Glendale, Elk Grove, Lancaster, Corona, Salinas, Victorville, Concord, Vallejo.

Cities with figures closest to Costa Mesa's: Alexandria, VA, Cambridge, MA, Allentown, PA, Aurora, IL, Garden Grove, CA.