Area code 631 serves Suffolk County on Long Island, New York, including towns such as Huntington, Brookhaven, and Islip. Established in 1999 after a split from 516, it covers the eastern portion of the island. The area is known for its coastal towns, vineyards, and suburban communities. It is overlaid with 934, requiring ten-digit dialing. 631 reflects the unique cultural and geographic identity of eastern Long Island, from beaches and farms to bustling commuter towns.
Locations for Area Code - 631
Browse all cities and areas that belong to this area code.
Brentwood
- State: NY
- Population: 60,664
- Latitude: 40.78121, Longitude: -73.24623
- Elevation: 24 m
Centereach
- State: NY
- Population: 31,578
- Latitude: 40.85843, Longitude: -73.09955
- Elevation: 30 m
Central Islip
- State: NY
- Population: 34,450
- Latitude: 40.79065, Longitude: -73.20178
- Elevation: 27 m
Commack
- State: NY
- Population: 36,124
- Latitude: 40.84288, Longitude: -73.29289
- Elevation: 40 m
Copiague
- State: NY
- Population: 22,993
- Latitude: 40.68149, Longitude: -73.39984
- Elevation: 7 m
Coram
- State: NY
- Population: 39,113
- Latitude: 40.86871, Longitude: -73.00149
- Elevation: 29 m
Deer Park
- State: NY
- Population: 27,745
- Latitude: 40.76177, Longitude: -73.32929
- Elevation: 26 m
Dix Hills
- State: NY
- Population: 26,892
- Latitude: 40.80482, Longitude: -73.33623
- Elevation: 62 m
East Northport
- State: NY
- Population: 20,217
- Latitude: 40.87676, Longitude: -73.32456
- Elevation: 68 m
East Patchogue
- State: NY
- Population: 12,463
- Latitude: 40.76565, Longitude: -73.01511
- Elevation: 6 m
Hauppauge
- State: NY
- Population: 20,882
- Latitude: 40.82565, Longitude: -73.20261
- Elevation: 19 m
Holbrook
- State: NY
- Population: 27,195
- Latitude: 40.81232, Longitude: -73.07844
- Elevation: 36 m
Huntington Station
- State: NY
- Population: 33,029
- Latitude: 40.85343, Longitude: -73.41151
- Elevation: 66 m
Medford
- State: NY
- Population: 24,142
- Latitude: 40.8176, Longitude: -73.00011
- Elevation: 27 m
North Bay Shore
- State: NY
- Population: 26,337
- Latitude: 40.7251, Longitude: -73.24539
- Elevation: 5 m
North Lindenhurst
- State: NY
- Population: 11,652
- Latitude: 40.71427, Longitude: -73.38151
- Elevation: 13 m
Ronkonkoma
- State: NY
- Population: 19,082
- Latitude: 40.821, Longitude: -73.143
- Elevation: 34 m
Selden
- State: NY
- Population: 19,851
- Latitude: 40.86649, Longitude: -73.03566
- Elevation: 27 m
Shirley
- State: NY
- Population: 27,854
- Latitude: 40.80149, Longitude: -72.8676
- Elevation: 16 m
Smithtown
- State: NY
- Population: 26,470
- Latitude: 40.85593, Longitude: -73.20067
- Elevation: 18 m
West Babylon
- State: NY
- Population: 43,213
- Latitude: 40.71816, Longitude: -73.35429
- Elevation: 12 m
West Islip
- State: NY
- Population: 28,335
- Latitude: 40.70621, Longitude: -73.30623
- Elevation: 6 m
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