Carrierlytics City Coverage Guide

Mason City, IL 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 Mason City, IL ZIP codes, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for Mason City, IL

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 Mason City, IL

#1

Verizon

Coverage Score 88.9
In Mason City, IL
Overall
99.8%
4G LTE
99.8% avg. -87 dBm 4G LTE signal where 4G LTE coverage exists: avg. -87 dBm
5G
80.6% avg. -87 dBm 5G signal where 5G coverage exists: avg. -87 dBm
Fast 5G
66.3% avg. -85 dBm Fast 5G signal where Fast 5G coverage exists: avg. -85 dBm
Mason County, IL covered 95.4%
#2

T-Mobile

Coverage Score 82.8
In Mason City, IL
Overall
92.2%
4G LTE
92.2% avg. -93 dBm 4G LTE signal where 4G LTE coverage exists: avg. -93 dBm
5G
81.1% avg. -90 dBm 5G signal where 5G coverage exists: avg. -90 dBm
Fast 5G
57.8% avg. -87 dBm Fast 5G signal where Fast 5G coverage exists: avg. -87 dBm
Mason County, IL covered 77.8%
#3

AT&T

Coverage Score 77.7
In Mason City, IL
Overall
99.7%
4G LTE
99.7% avg. -102 dBm 4G LTE signal where 4G LTE coverage exists: avg. -102 dBm
5G
93.3% avg. -111 dBm 5G signal where 5G coverage exists: avg. -111 dBm
Fast 5G
81.5% avg. -110 dBm Fast 5G signal where Fast 5G coverage exists: avg. -110 dBm
Mason County, IL covered 98.5%

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

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Best phone plans for Mason City, IL

Best phone plans on Verizon's network for Mason City, IL

88.9 Verizon coverage score Ranked #1 in Mason City, IL
Best unlimited data plan Best hotspot plan Best family plan
100 Value Score

Total Wireless MAX 5G BYO

Elite Value

Price
$25/mo
Data
Unlimited
Hotspot
Unlimited
View plan
See all plans on Verizon Compare all phone plans

Coverage by ZIP code in Mason City, IL

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
62664 99.7% 99.7% 93.3% 81.5% 92.2% 92.2% 81.1% 57.8% 99.8% 99.8% 80.6% 66.3%

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 Mason City, IL 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.