631 Area Code belongs to the New York (NY) State.
Other cities in the 631 Area Code.
Babylon, Bay Shore, Bayport, Bohemia, Brentwood, Brookhaven, Centereach, Central Islip, Commack, Copiague, Coram, Deer Park, Dix Hills, East Hampton, East Islip, East Northport, Farmingville, Hauppauge, Holbrook, Holtsville, Huntington Station, Islip, Kings Park, Lake Grove, Lindenhurst, Manorville, Mastic, Medford, Middle Island, Miller Place, Mount Sinai, Nesconset, Northport, Oakdale, Port Jefferson, Ridge, Riverhead, Ronkonkoma, Sayville, Selden, Shirley, Smithtown, Sound Beach, Southampton, Southold, Stony Brook, Wyandanch
New York (NY)
also shares with these area codes: