Area Code 631
Area Code 631 is in New York
(212, 332, 646 and 917) - (315 and 680)
(631 and 934) - (518 and 838)
(718, 347, 917 and 929)
Area Code 631 History:
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:
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.