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

The area code 631 is used in the state of New York in eastern Long Island exclusively for Suffolk County.

Suffolk used to share the area code 516 with neighboring Nassau County until November 1, 1999, when it was decided the area code would be split and Suffolk would end up with a new area code: 631.^[1]

Upon nationwide adoption of area codes in October 1947, Suffolk, along with Nassau, were given the 914 area code along with counties in the Lower Hudson Valley until it split very soon after in 1951, giving Long Island the 516 area code exclusively.^[2]

[edit] See also

• NANPA Area Code Map of New York
• List of exchanges from AreaCodeDownload.com, 631 Area Code

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

[edit] References

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