631 Area Code 🌍☎️

The most populous cities in area code 631 are: Brentwood, Huntington, Farmingdale, Riverhead, and Central Islip.

Other cities in the 631 area code include: Amityville, Deer Park, Patchogue, Commack, Babylon, Selden, Smithtown, Ronkonkoma, Yaphank, Sayville, Port Jefferson, Lindenhurst, East Hampton, Southampton, Northport, Islip, Shoreham, Greenport, Westhampton Beach, Wantagh, Brightwaters, Bellport, Eastport, Stony Brook, Sag Harbor, Saint James, Bayport, Mastic, Hampton Bays, East Setauket, East Islip, Montauk, Water Mill, Kings Park, Cold Spring Harbor, Massapequa Park, Mattituck, Bay Shore, Wyandanch, Southold, Garden City, Wading River, Center Moriches, Hicksville, Laurel, Orient, Moriches, Peconic, Westbury, West Sayville, Huntington Station, Bethpage, Woodbury, and Shelter Island.

Brentwood is a hamlet in the Town of Islip in Suffolk County, New York, United States. As of the 2010 Census, the population of Brentwood was 60,664.

Huntington is one of ten towns in Suffolk County, New York, United States. Founded in 1653, it is located on the north shore of Long Island in northwestern Suffolk County, with Long Island Sound to its north and Nassau County adjacent to the west. Huntington is part of the New York metropolitan area. As of the United States 2010 Census, the town population was 203,264.

Farmingdale is an incorporated village on Long Island within the Town of Oyster Bay in Nassau County, New York, in the United States. The population was 8,189 at the 2010 Census.As of 2012 the mayor is Ralph Ekstrand.

The 631 area code lies within the Eastern Daylight Time Zone (or EDT). The current time in Eastern Daylight Time is 07:22 AM on Mar 10, 2026.