Area code 631

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The blue area is New York State; the red area is area code 631.

Area code 631 is the telephone area code for Suffolk County, New York, located on central and eastern Long Island. It was created in 1999 as a split from area code 516. Population centers within the area code include Babylon, Brookhaven, Huntington, Patchogue, Smithtown, Shelter Island, and The Hamptons. 631 was the first area code added to the state of New York -- outside of New York City proper -- since 1954.

History of Suffolk County area codes[edit]

1947 – 1951: 914[edit]

Upon North American adoption of area codes in October 1947, Suffolk, Nassau, and the lower Hudson Valley were assigned the 914 area code.[1] As Direct Distance Dialing had not been introduced anywhere in North America, no customer ever used 914 to reach this area.

1951 – 1999: 516[edit]

In 1951, the 516 area code was assigned to Nassau and Suffolk.[2] 516 was the area code in effect when Direct Distance Dialing was introduced to communities on Long Island.

1999 – present: 631[edit]

On November 1, 1999, Nassau County retained the 516 area code, while Suffolk received the new 631 area code.[3]

Future[edit]

According to the 2013 NPA Exhaust Projection, area code 631 is expected to be exhausted in the first quarter of 2016.[4]

See also[edit]

New York area codes: 212, 315, 347, 516, 518, 585, 607, 631, 646, 716, 718, 845, 914, 917, 929
North: 203, 401, 860
West: 516 area code 631 East: Atlantic Ocean
South: Atlantic Ocean
Connecticut area codes: 203, 475, 860
Rhode Island area codes: 401

Coordinates: 40°50′N 73°00′W / 40.84°N 73.00°W / 40.84; -73.00

References[edit]