SUNNYVALE · CA · FCC DATA

Best cell phone coverage in Sunnyvale Sunnyvale, California

AT&T, T-Mobile and Verizon all report outdoor coverage of between 96.3% and 100% of Sunnyvale, 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 · SUNNYVALE, CA

Coverage in Sunnyvale, CA

Population 156,792 (Census 2024 estimate)

What stands out in Sunnyvale

  • Verizon reports 99.1% of Sunnyvale in a moving car, against 33.6% of California as a whole.
  • Beyond the city limits it thins: across Santa Clara County, T-Mobile reports 31.1% in a moving car, against 88.2% in Sunnyvale.
  • 5G at 35/3 Mbps covers 99.6% of Sunnyvale, against 47.7% of California.
✓ ALL THREE WITHIN 3.7 POINTS
All three carriers
96.3–100%

AT&T vs T-Mobile vs Verizon in Sunnyvale

=
Verizon
Outdoor
100%
In car
99.1%
=
T-Mobile
Outdoor
96.5%
In car
88.2%
=
AT&T
Outdoor
96.3%
In car
95.2%

4G and 5G across all carriers in Sunnyvale

4G LTE
100%
5G 7/1
100%
5G 35/3
99.6%

Check your street on each carrier's map

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

Around Sunnyvale, in Santa Clara County

The towns nearby where one carrier reports the least outdoors: Palo Alto (AT&T 75.9%), Los Altos Hills (AT&T 87.7%), Los Gatos (AT&T 89.4%), San Jose (T-Mobile 91.1%).

Questions about coverage in Sunnyvale

Q1

How does Sunnyvale compare with the rest of California?

Outdoors Verizon 100% (state 64.3%), T-Mobile 96.5% (state 51.4%), AT&T 96.3% (state 57.3%); in a moving car Verizon 99.1% (state 33.6%), AT&T 95.2% (state 36.2%), T-Mobile 88.2% (state 26.8%).

ZIP codes mostly inside Sunnyvale

94085, 94086, 94087, 94089.

See the statewide California comparison, or coverage in Bakersfield, Chula Vista, San Bernardino, Garden Grove, Oceanside, Salinas, Pomona, Santa Clara, Fairfield, Berkeley, Antioch, Santa Maria.

Cities with figures closest to Sunnyvale's: Cleveland, OH, New Haven, CT, Visalia, CA, Boise, ID, Wilmington, NC.