CARLSBAD · CA · FCC DATA

Best cell phone coverage in Carlsbad Carlsbad, California

AT&T, T-Mobile and Verizon all report outdoor coverage of between 96.8% and 100% of Carlsbad, 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 · CARLSBAD, CA

Coverage in Carlsbad, CA

Population 113,575 (Census 2024 estimate)

What stands out in Carlsbad

  • Verizon reports 95.9% of Carlsbad in a moving car, against 33.6% of California as a whole.
  • Beyond the city limits it thins: across San Diego County, Verizon reports 46.5% in a moving car, against 95.9% in Carlsbad.
  • 5G at 35/3 Mbps covers 99.3% of Carlsbad, against 47.7% of California.
  • T-Mobile loses the most of Carlsbad in a moving car: 99.9% outdoors, 80.2% in a car.
✓ ALL THREE WITHIN 3.2 POINTS
All three carriers
96.8–100%

AT&T vs T-Mobile vs Verizon in Carlsbad

=
Verizon
Outdoor
100%
In car
95.9%
=
T-Mobile
Outdoor
99.9%
In car
80.2%
=
AT&T
Outdoor
96.8%
In car
94.9%

4G and 5G across all carriers in Carlsbad

4G LTE
100%
5G 7/1
100%
5G 35/3
99.3%

Check your street on each carrier's map

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

Around Carlsbad, in San Diego County

The towns nearby where one carrier reports the least outdoors: Borrego Springs (T-Mobile 1.5%), Descanso (T-Mobile 58.2%), Jacumba (AT&T 68.4%), Pine Valley (AT&T 78.7%).

Questions about coverage in Carlsbad

Q1

How does Carlsbad compare with the rest of California?

Outdoors Verizon 100% (state 64.3%), T-Mobile 99.9% (state 51.4%), AT&T 96.8% (state 57.3%); in a moving car Verizon 95.9% (state 33.6%), AT&T 94.9% (state 36.2%), T-Mobile 80.2% (state 26.8%).

ZIP codes mostly inside Carlsbad

92008, 92009, 92010, 92011.

See the statewide California comparison, or coverage in Oakland, Irvine, Fontana, Moreno Valley, Huntington Beach, Elk Grove, Rancho Cucamonga, Escondido, Fairfield, Berkeley, Ventura, Downey.

Cities with figures closest to Carlsbad's: Colorado Springs, CO, Greensboro, NC, Las Cruces, NM, Overland Park, KS, Tyler, TX.