The most populous cities in area code 631 are: Brentwood, Hicksville, Commack, Central Islip, and Huntington Station.
Other cities in the 631 area code include: Garden City, Bay Shore, Lindenhurst, Deer Park, Saint James, Smithtown, Selden, Ronkonkoma, Huntington, Islip, Wantagh, Massapequa Park, Kings Park, Sayville, Bethpage, Mastic, Westbury, East Setauket, East Islip, Stony Brook, Riverhead, Hampton Bays, Patchogue, Babylon, Wyandanch, Amityville, Woodbury, Farmingdale, Center Moriches, Bayport, Port Jefferson, Wading River, Northport, Yaphank, Southold, Cold Spring Harbor, West Sayville, Mattituck, Montauk, Southampton, Brightwaters, Moriches, Water Mill, Sag Harbor, Greenport, Bellport, Westhampton Beach, Eastport, Shelter Island, East Hampton, Laurel, Orient, Peconic, and Shoreham.
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.
Hicksville is a hamlet and census-designated place (CDP) located within the Town of Oyster Bay in Nassau County, New York, United States, on Long Island. The population of the CDP was 41,547 at the 2010 census.
Commack / k ɑː m æ k / is a census designated place (CDP) that roughly corresponds to the hamlet by the same name in the towns of Huntington and Smithtown in Suffolk County, New York, United States on Long Island. The CDP's population was 36,124 at the 2010 census.
The 631 area code lies within the Eastern Daylight Time Zone (or EDT). The current time in Eastern Daylight Time is 4:13 PM on Apr 20, 2021.
