Area Code 631

Area Code 631 is in New York

Other New York Area Codes
212, 315, 347, 516, 518, 585, 607, 631, 646, 716, 718, 845, 914, 917, 929, 934

New York Area Code Overlays
(212, 646 and 917) - (631 and 934)
(718, 347, 917 and 929)


Area Code 631 History:

11/01/1999
Area code 631 was put into service. Area code 631 was created from a split of area code 516.

On July 16, 2016 area code 934 was put into service as an overlay of area code 631. Effective 06/18/2016 ten digit dialing (area code + seven digit number) became necessary in the 631/934 overlay because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.

Counties in New York within area code 631 include:

Suffolk County.

Major cities or places in New York within area code 631 include:

Area code 631 serves Suffolk County on Long Island the including the towns and communities of Babylon, Brookhaven, East Hampton, Huntington, Islip, Riverhead, Shelter Island, Smithtown, Southampton and Southold.

New York Area Code Map



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