Carrierlytics City Coverage Guide

Guerneville, CA Cell Phone Coverage Map & Network Rankings (2026)

Don't overpay for a network that struggles where you actually use your phone.

Using FCC mobile coverage data across Guerneville, CA ZIP codes, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for Guerneville, CA

Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.

Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.

Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.

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Cell phone coverage rankings by network in Guerneville, CA

#1

T-Mobile

Coverage Score 89.9
In Guerneville, CA
Overall
95.3%
4G LTE
86.6% avg. -96 dBm 4G LTE signal where 4G LTE coverage exists: avg. -96 dBm
5G
95.3% avg. -88 dBm 5G signal where 5G coverage exists: avg. -88 dBm
Fast 5G
72.4% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
Sonoma County, CA covered 57.7%
#2

AT&T

Coverage Score 70.8
In Guerneville, CA
Overall
94.0%
4G LTE
94.0% avg. -108 dBm 4G LTE signal where 4G LTE coverage exists: avg. -108 dBm
5G
80.6% avg. -111 dBm 5G signal where 5G coverage exists: avg. -111 dBm
Fast 5G
56.9% avg. -109 dBm Fast 5G signal where Fast 5G coverage exists: avg. -109 dBm
Sonoma County, CA covered 66.9%
#3

Verizon

Coverage Score 60.9
In Guerneville, CA
Overall
99.1%
4G LTE
99.1% avg. -97 dBm 4G LTE signal where 4G LTE coverage exists: avg. -97 dBm
5G
25.4% avg. -100 dBm 5G signal where 5G coverage exists: avg. -100 dBm
Fast 5G
15.1% avg. -100 dBm Fast 5G signal where Fast 5G coverage exists: avg. -100 dBm
Sonoma County, CA covered 79.7%

County coverage is shown for surrounding-area context and uses land-area only coverage.

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Best phone plans for Guerneville, CA

Best phone plans on T-Mobile's network for Guerneville, CA

89.9 T-Mobile coverage score Ranked #1 in Guerneville, CA
Best family plan
79.5 Value Score

T-Mobile Better Value

Fair Value

Price
$140.01/mo for 3 lines ($46.67/line)
Data
Unlimited
Hotspot
Unlimited
View plan
See all plans on T-Mobile Compare all phone plans

Coverage by ZIP code in Guerneville, CA

ZIP code areas can extend beyond city limits, so this table is best used for local comparison around the city.

ZIP Code AT&T T-Mobile Verizon
95446 78.6% 78.0% 62.5% 44.8% 65.8% 58.7% 63.9% 43.0% 74.4% 74.3% 19.4% 12.1%
95462 88.1% 88.1% 78.6% 41.7% 77.4% 73.8% 76.2% 56.0% 91.7% 91.7% 33.3% 14.3%
95471 95.2% 95.2% 77.1% 61.4% 95.2% 81.9% 95.2% 68.7% 100.0% 100.0% 21.7% 12.0%

About The Coverage Data

Coverage and signal estimates are derived by Carrierlytics from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of Guerneville, CA where that carrier has coverage.

If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.