Lewis County, NY Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in Lewis County, NY

Coverage rankings for Lewis County, NY

AT&T currently ranks first for coverage in this area, with a coverage score of 50.5. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1AT&T50.565.2%65.2%34.4%27.4% -117 dBm
2Verizon41.760.7%60.7%12.9%6.6% -102 dBm
3T-Mobile33.828.7%28.7%24.1%14.3% -95 dBm

Scores include coverage area, network type, and average signal strength.

Cell phone coverage map for Lewis County, NY

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 Compare Wireless Carriers.

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Cell phone coverage by network in Lewis County, NY

#1

AT&T

Coverage Score 50.5
In Lewis County, NY
Overall
65.2%
4G LTE
65.2%
5G
34.4%
Fast 5G
27.4%
Average Signal -117 dBm
#2

Verizon

Coverage Score 41.7
In Lewis County, NY
Overall
60.7%
4G LTE
60.7%
5G
12.9%
Fast 5G
6.6%
Average Signal -102 dBm
#3

T-Mobile

Coverage Score 33.8
In Lewis County, NY
Overall
28.7%
4G LTE
28.7%
5G
24.1%
Fast 5G
14.3%
Average Signal -95 dBm
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Coverage by city in Lewis County, NY

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

CityVerizonAT&TT-Mobile
Beaver Falls, NY 100.0% 100.0% 8.0% 8.0% -100 dBm 100.0% 100.0% 92.0% 68.0% -119 dBm 76.0% 76.0% 36.0% 12.0% -103 dBm
Brantingham, NY 27.1% 27.0% 0.2% 0.0% -107 dBm 35.2% 35.2% 3.1% 1.9% -120 dBm 1.8% 1.8% 1.0% 0.0% -104 dBm
Castorland, NY 100.0% 100.0% 12.5% 0.0% -100 dBm 100.0% 100.0% 100.0% 100.0% -115 dBm 100.0% 100.0% 100.0% 62.5% -94 dBm
Constableville, NY 100.0% 100.0% 92.6% 74.1% -89 dBm 96.3% 96.3% 29.6% 18.5% -120 dBm 18.5% 18.5% 18.5% 3.7% -100 dBm
Copenhagen, NY 100.0% 100.0% 42.3% 30.8% -96 dBm 84.6% 84.6% 23.1% 19.2% -117 dBm 100.0% 100.0% 100.0% 100.0% -80 dBm
Croghan, NY 100.0% 100.0% 90.0% 70.0% -92 dBm 100.0% 100.0% 100.0% 100.0% -106 dBm 100.0% 100.0% 100.0% 90.0% -89 dBm
Glenfield, NY 52.1% 52.1% 2.7% 0.4% -106 dBm 61.7% 61.7% 25.2% 15.1% -120 dBm 14.5% 14.4% 7.8% 2.8% -103 dBm
Greig, NY 98.4% 98.4% 0.0% 0.0% -100 dBm 100.0% 100.0% 63.5% 53.2% -118 dBm 37.3% 37.3% 33.3% 2.4% -100 dBm
Harrisville, NY 75.4% 75.4% 16.0% 8.6% -103 dBm 64.4% 64.4% 18.7% 16.9% -117 dBm 13.9% 13.9% 10.1% 5.1% -98 dBm
Lowville, NY 100.0% 100.0% 58.1% 30.2% -89 dBm 100.0% 100.0% 100.0% 100.0% -106 dBm 100.0% 100.0% 100.0% 97.7% -81 dBm
Lyons Falls, NY 100.0% 100.0% 0.0% 0.0% -107 dBm 100.0% 100.0% 89.5% 68.4% -112 dBm 42.1% 42.1% 42.1% 21.1% -96 dBm
Martinsburg, NY 100.0% 100.0% 27.0% 0.0% -104 dBm 100.0% 100.0% 70.3% 62.2% -120 dBm 73.0% 73.0% 56.8% 24.3% -99 dBm
Port Leyden, NY 100.0% 100.0% 0.0% 0.0% -98 dBm 100.0% 100.0% 100.0% 100.0% -113 dBm 6.3% 6.3% 0.0% 0.0% -110 dBm
Turin, NY 100.0% 100.0% 0.0% 0.0% -101 dBm 100.0% 100.0% 100.0% 32.0% -115 dBm 96.0% 96.0% 88.0% 52.0% -95 dBm
West Leyden, NY 51.5% 51.5% 10.0% 6.6% -103 dBm 11.9% 11.9% 3.5% 1.7% -120 dBm 33.1% 33.1% 26.4% 13.3% -97 dBm
Natural Bridge, NY 100.0% 100.0% 33.3% 16.7% -94 dBm 100.0% 100.0% 100.0% 96.7% -100 dBm 100.0% 100.0% 100.0% 90.0% -88 dBm
West Carthage, NY 100.0% 100.0% 0.0% 0.0% -88 dBm 100.0% 100.0% 100.0% 93.3% -98 dBm 100.0% 100.0% 96.7% 76.7% -92 dBm

About The Coverage Data

Coverage and signal estimates are derived by Compare Wireless Carriers 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 Lewis County, NY 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.