RANCHO CUCAMONGA · CA · FCC DATA

Best cell phone coverage in Rancho Cucamonga Rancho Cucamonga, California

AT&T, T-Mobile and Verizon all report outdoor coverage of 100% of Rancho Cucamonga, 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 · RANCHO CUCAMONGA, CA

Coverage in Rancho Cucamonga, CA

Population 176,675 (Census 2024 estimate)

What stands out in Rancho Cucamonga

  • Verizon reports 99.1% of Rancho Cucamonga in a moving car, against 33.6% of California as a whole.
  • Beyond the city limits it thins: across San Bernardino County, Verizon reports 30.6% in a moving car, against 99.1% in Rancho Cucamonga.
  • 5G at 35/3 Mbps covers 100% of Rancho Cucamonga, against 47.7% of California.
  • T-Mobile loses the most of Rancho Cucamonga in a moving car: 100% outdoors, 88.8% in a car.
✓ ALL THREE REPORT THE SAME
All three carriers
100%

AT&T vs T-Mobile vs Verizon in Rancho Cucamonga

=
AT&T
Outdoor
100%
In car
99.2%
=
Verizon
Outdoor
100%
In car
99.1%
=
T-Mobile
Outdoor
100%
In car
88.8%

4G and 5G across all carriers in Rancho Cucamonga

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

Check your street on each carrier's map

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

Around Rancho Cucamonga, in San Bernardino County

The towns nearby where one carrier reports the least outdoors: Lytle Creek (T-Mobile 27.8%), Morongo Valley (T-Mobile 69.7%), Homestead Valley (AT&T 74.2%), Big Bear City (T-Mobile 80.4%).

Questions about coverage in Rancho Cucamonga

Q1

How does Rancho Cucamonga compare with the rest of California?

Outdoors AT&T 100% (state 57.3%), Verizon 100% (state 64.3%), T-Mobile 100% (state 51.4%); in a moving car AT&T 99.2% (state 36.2%), Verizon 99.1% (state 33.6%), T-Mobile 88.8% (state 26.8%).

ZIP codes mostly inside Rancho Cucamonga

91701, 91730, 91737.

See the statewide California comparison, or coverage in Bakersfield, Riverside, Lancaster, Sunnyvale, Escondido, Pomona, Fullerton, Simi Valley, Concord, Fairfield, Antioch, Carlsbad.

Cities with figures closest to Rancho Cucamonga's: Tulsa, OK, Topeka, KS, Clovis, CA, Fresno, CA, Fort Worth, TX.