Carrierlytics County Coverage Guide

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

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

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

Suffolk County, NY

Cell phone coverage map for Suffolk 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 Carrierlytics.

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Cell phone coverage rankings by network in Suffolk County, NY

#1

T-Mobile

Coverage Score 86.9
In Suffolk County, NY
Overall
92.0%
4G LTE
91.9% avg. -91 dBm 4G LTE signal where 4G LTE coverage exists: avg. -91 dBm
5G
85.1% avg. -88 dBm 5G signal where 5G coverage exists: avg. -88 dBm
Fast 5G
67.4% avg. -84 dBm Fast 5G signal where Fast 5G coverage exists: avg. -84 dBm
#2

Verizon

Coverage Score 78.4
In Suffolk County, NY
Overall
99.8%
4G LTE
99.8% avg. -88 dBm 4G LTE signal where 4G LTE coverage exists: avg. -88 dBm
5G
58.0% avg. -92 dBm 5G signal where 5G coverage exists: avg. -92 dBm
Fast 5G
37.7% avg. -88 dBm Fast 5G signal where Fast 5G coverage exists: avg. -88 dBm
#3

AT&T

Coverage Score 77.7
In Suffolk County, NY
Overall
98.8%
4G LTE
98.7% avg. -97 dBm 4G LTE signal where 4G LTE coverage exists: avg. -97 dBm
5G
95.3% avg. -107 dBm 5G signal where 5G coverage exists: avg. -107 dBm
Fast 5G
61.6% avg. -103 dBm Fast 5G signal where Fast 5G coverage exists: avg. -103 dBm
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Coverage by city in Suffolk County, NY

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

City Verizon AT&T T-Mobile
Amagansett, NY 100.0% 100.0% 63.4% 48.4% 99.4% 99.4% 84.5% 66.5% 68.9% 68.9% 65.8% 47.8%
Amityville, NY 100.0% 100.0% 100.0% 83.0% 100.0% 100.0% 98.1% 50.9% 100.0% 100.0% 100.0% 98.1%
Aquebogue, NY 100.0% 100.0% 4.3% 0.0% 98.9% 98.9% 98.9% 76.3% 100.0% 100.0% 86.0% 57.0%
Asharoken, NY 97.2% 97.2% 52.8% 33.3% 80.6% 80.6% 61.1% 25.0% 75.0% 75.0% 66.7% 44.4%
Babylon, NY 100.0% 100.0% 100.0% 91.7% 98.3% 98.3% 98.3% 51.7% 100.0% 100.0% 100.0% 100.0%
Baiting Hollow, NY 100.0% 100.0% 38.7% 13.7% 95.2% 95.2% 82.3% 46.8% 74.2% 74.2% 49.2% 16.9%
Bay Shore, NY 100.0% 100.0% 67.4% 32.6% 98.6% 98.6% 96.4% 39.1% 100.0% 100.0% 100.0% 98.6%
Bayport, NY 100.0% 100.0% 46.7% 21.7% 98.9% 98.9% 98.9% 57.6% 100.0% 100.0% 95.7% 65.2%
Baywood, NY 100.0% 100.0% 94.8% 67.2% 100.0% 100.0% 98.3% 51.7% 100.0% 100.0% 100.0% 100.0%
Belle Terre, NY 100.0% 100.0% 56.0% 36.0% 96.0% 96.0% 96.0% 84.0% 96.0% 96.0% 96.0% 96.0%
Bellport, NY 100.0% 100.0% 37.8% 5.4% 100.0% 100.0% 97.3% 64.9% 100.0% 100.0% 100.0% 97.3%
Blue Point, NY 100.0% 100.0% 86.0% 55.8% 97.7% 97.7% 95.3% 55.8% 100.0% 100.0% 100.0% 95.3%
Bohemia, NY 99.5% 99.5% 43.3% 24.8% 95.2% 95.2% 86.7% 44.3% 85.7% 85.7% 75.2% 56.2%
Brentwood, NY 100.0% 100.0% 96.3% 80.5% 99.6% 99.6% 99.6% 55.8% 100.0% 100.0% 100.0% 100.0%
Bridgehampton, NY 100.0% 100.0% 45.3% 31.1% 99.7% 99.7% 93.1% 53.1% 91.5% 90.9% 86.8% 63.8%
Brightwaters, NY 100.0% 100.0% 88.0% 64.0% 100.0% 100.0% 100.0% 56.0% 100.0% 100.0% 100.0% 92.0%
Brookhaven, NY 100.0% 100.0% 58.0% 33.6% 100.0% 100.0% 98.6% 58.7% 96.5% 96.5% 77.6% 52.4%
Calverton, NY 99.8% 99.8% 48.2% 30.4% 100.0% 100.0% 97.5% 65.5% 87.8% 87.8% 75.2% 52.9%
Captree, NY 100.0% 100.0% 100.0% 100.0% 84.2% 84.2% 84.2% 68.4% 100.0% 100.0% 100.0% 100.0%
Center Moriches, NY 100.0% 100.0% 78.9% 58.6% 100.0% 100.0% 100.0% 72.7% 93.8% 93.8% 92.2% 77.3%
Centereach, NY 100.0% 100.0% 86.2% 62.7% 100.0% 100.0% 99.5% 52.1% 100.0% 100.0% 98.2% 88.9%
Centerport, NY 100.0% 100.0% 38.9% 20.4% 100.0% 100.0% 98.1% 77.8% 96.3% 96.3% 94.4% 83.3%
Central Islip, NY 100.0% 100.0% 77.3% 55.8% 97.1% 97.1% 94.8% 50.0% 100.0% 100.0% 97.1% 94.2%
Cold Spring Harbor, NY 100.0% 100.0% 7.1% 2.4% 100.0% 100.0% 100.0% 75.3% 95.3% 95.3% 88.2% 60.0%
Commack, NY 100.0% 100.0% 83.9% 59.5% 100.0% 100.0% 100.0% 76.3% 100.0% 99.7% 100.0% 90.0%
Copiague, NY 100.0% 100.0% 100.0% 93.4% 100.0% 100.0% 100.0% 72.4% 100.0% 100.0% 100.0% 100.0%
Coram, NY 100.0% 100.0% 72.7% 44.2% 100.0% 100.0% 98.2% 61.4% 100.0% 100.0% 99.7% 94.7%
Cutchogue, NY 100.0% 100.0% 32.8% 20.2% 98.7% 98.7% 95.8% 64.3% 91.6% 91.2% 85.7% 71.0%
Deer Park, NY 100.0% 100.0% 98.7% 86.6% 100.0% 100.0% 100.0% 52.3% 100.0% 100.0% 100.0% 100.0%
Dering Harbor, NY 100.0% 100.0% 25.0% 25.0% 100.0% 100.0% 100.0% 25.0% 100.0% 100.0% 100.0% 75.0%
Dix Hills, NY 100.0% 100.0% 78.9% 51.0% 100.0% 100.0% 100.0% 67.0% 100.0% 100.0% 99.2% 92.0%
East Farmingdale, NY 100.0% 100.0% 95.7% 86.0% 100.0% 100.0% 97.8% 53.8% 100.0% 100.0% 100.0% 100.0%
East Hampton, NY 100.0% 100.0% 58.3% 47.0% 100.0% 100.0% 100.0% 65.2% 73.9% 73.9% 60.9% 54.8%
East Hampton North, NY 100.0% 100.0% 75.7% 42.6% 100.0% 100.0% 100.0% 92.6% 91.2% 91.2% 66.9% 54.4%
East Islip, NY 100.0% 100.0% 62.9% 26.8% 100.0% 100.0% 99.0% 41.2% 100.0% 100.0% 86.6% 55.7%
East Marion, NY 100.0% 100.0% 14.8% 3.7% 98.1% 98.1% 98.1% 83.3% 98.1% 98.1% 98.1% 92.6%
East Moriches, NY 100.0% 100.0% 58.2% 30.6% 99.3% 99.3% 99.3% 57.5% 94.0% 94.0% 87.3% 70.1%
East Northport, NY 100.0% 100.0% 84.3% 49.6% 100.0% 100.0% 100.0% 94.5% 100.0% 100.0% 100.0% 96.1%
East Patchogue, NY 100.0% 100.0% 76.8% 49.3% 99.5% 99.5% 99.0% 57.1% 100.0% 100.0% 91.6% 72.9%
East Quogue, NY 100.0% 100.0% 63.1% 27.2% 99.1% 95.4% 98.2% 75.1% 95.9% 95.9% 88.5% 60.4%
East Setauket, NY 100.0% 100.0% 54.1% 32.9% 100.0% 100.0% 100.0% 64.4% 100.0% 100.0% 100.0% 90.4%
East Shoreham, NY 100.0% 100.0% 64.4% 46.7% 100.0% 100.0% 94.8% 77.8% 97.8% 97.0% 94.8% 77.8%
Eastport, NY 100.0% 100.0% 69.7% 53.2% 99.1% 99.1% 99.1% 80.7% 100.0% 100.0% 98.2% 70.6%
Eatons Neck, NY 100.0% 100.0% 17.4% 13.0% 95.7% 95.7% 69.6% 13.0% 91.3% 91.3% 82.6% 21.7%
Elwood, NY 100.0% 100.0% 45.2% 27.0% 100.0% 100.0% 100.0% 66.1% 99.1% 99.1% 98.3% 85.2%
Farmingville, NY 100.0% 100.0% 91.1% 63.4% 100.0% 100.0% 97.0% 65.3% 100.0% 100.0% 100.0% 99.0%
Fire Island, NY 100.0% 100.0% 94.0% 62.5% 85.8% 85.8% 75.9% 22.8% 97.0% 97.0% 95.7% 81.5%
Fishers Island, NY 88.7% 87.6% 8.2% 0.0% 94.8% 94.8% 75.3% 46.4% 46.4% 46.4% 39.2% 18.6%
Flanders, NY 100.0% 100.0% 36.6% 19.0% 97.2% 95.8% 90.8% 53.5% 86.6% 86.6% 63.0% 38.0%
Fort Salonga, NY 100.0% 100.0% 57.5% 33.5% 100.0% 100.0% 100.0% 78.1% 100.0% 100.0% 98.7% 91.8%

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 Suffolk 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.