Carrierlytics County Coverage Guide

Fergus County, MT Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Fergus County, MT.

Using FCC mobile coverage data across cities and ZIP codes in Fergus County, MT, Carrierlytics compares the top-performing networks and the cheapest plans that use them.

Fergus County, MT

Cell phone coverage map for Fergus County, MT

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 Fergus County, MT

#1

T-Mobile

Coverage Score 50.8
In Fergus County, MT
Overall
48.4%
4G LTE
48.4% avg. -98 dBm 4G LTE signal where 4G LTE coverage exists: avg. -98 dBm
5G
38.3% avg. -93 dBm 5G signal where 5G coverage exists: avg. -93 dBm
Fast 5G
23.5% avg. -89 dBm Fast 5G signal where Fast 5G coverage exists: avg. -89 dBm
#2

Verizon

Coverage Score 49.3
In Fergus County, MT
Overall
64.6%
4G LTE
64.3% avg. -98 dBm 4G LTE signal where 4G LTE coverage exists: avg. -98 dBm
5G
20.4% avg. -94 dBm 5G signal where 5G coverage exists: avg. -94 dBm
Fast 5G
11.4% avg. -89 dBm Fast 5G signal where Fast 5G coverage exists: avg. -89 dBm
#3

AT&T

Coverage Score 25.8
In Fergus County, MT
Overall
32.9%
4G LTE
32.7% avg. -114 dBm 4G LTE signal where 4G LTE coverage exists: avg. -114 dBm
5G
19.2% avg. -117 dBm 5G signal where 5G coverage exists: avg. -117 dBm
Fast 5G
16.4% avg. -116 dBm Fast 5G signal where Fast 5G coverage exists: avg. -116 dBm
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Coverage by city in Fergus County, MT

Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.

City Verizon AT&T T-Mobile
Ayers Ranch Colony, MT 100.0% 100.0% 90.0% 80.0% 90.0% 90.0% 0.0% 0.0% 100.0% 100.0% 100.0% 80.0%
Brooks, MT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
Coffee Creek, MT 100.0% 100.0% 30.0% 0.0% 100.0% 100.0% 60.0% 60.0% 100.0% 100.0% 30.0% 0.0%
Danvers, MT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 88.9%
Deerfield Colony, MT 100.0% 100.0% 0.0% 0.0% 93.3% 93.3% 86.7% 86.7% 100.0% 100.0% 100.0% 100.0%
Denton, MT 88.9% 88.9% 61.1% 0.0% 83.3% 83.3% 61.1% 61.1% 100.0% 100.0% 38.9% 0.0%
Fords Creek Colony, MT 100.0% 100.0% 40.0% 40.0% 80.0% 80.0% 0.0% 0.0% 80.0% 80.0% 80.0% 0.0%
Forest Grove, MT 81.4% 81.4% 6.1% 2.4% 22.5% 22.5% 9.3% 8.8% 23.7% 23.7% 18.1% 7.5%
Grass Range, MT 100.0% 100.0% 100.0% 100.0% N/A N/A N/A N/A 100.0% 100.0% 100.0% 100.0%
Hilger, MT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
King Ranch Colony, MT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 88.5% 3.8% 100.0% 100.0% 100.0% 80.8%
Lewistown, MT 100.0% 100.0% 98.0% 92.6% 99.3% 99.3% 95.9% 92.6% 100.0% 100.0% 100.0% 100.0%
Lewistown Heights, MT 100.0% 100.0% 93.4% 88.5% 100.0% 100.0% 96.7% 93.4% 100.0% 100.0% 100.0% 100.0%
Moore, MT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 75.0% 75.0% 100.0% 100.0% 87.5% 50.0%
Roy, MT 100.0% 100.0% 100.0% 98.9% 1.1% 1.1% 0.0% 0.0% 100.0% 100.0% 100.0% 100.0%
Spring Creek Colony, MT 100.0% 100.0% 0.0% 0.0% 100.0% 100.0% 82.4% 82.4% 100.0% 100.0% 100.0% 100.0%
Warm Spring Creek, MT 41.7% 41.7% 0.0% 0.0% N/A N/A N/A N/A 66.7% 66.7% 25.0% 0.0%
Winifred, MT 7.7% 7.7% 0.0% 0.0% N/A N/A N/A N/A N/A N/A N/A N/A

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 Fergus County, MT 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.