Area codes 631 and 934
Area codes in Suffolk County, New York
Area codes 631 and 934
Area codes 631 and 934 are the telephone area codes in the North American Numbering Plan (NANP) for Suffolk County, New York, on Long Island. Area code 631 was created in 1999 in a split of 516 and 934 was added as an overlay in 2016. Communities in the numbering plan area include Babylon, Huntington, Islip, Smithtown, Brookhaven, Riverhead, Southampton, Southold, Shelter Island, and East Hampton.
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