Area codes 631 and 934
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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.
History
[edit | edit source]1947–1951: 914
[edit | edit source]With the announcement of a new nationwide telephone numbering plan by the American Telephone and Telegraph Company (AT&T) in October 1947, Suffolk County, Nassau County, the lower Hudson Valley, and some areas adjacent were assigned area code 914.[1]
1951–1999: 516
[edit | edit source]During 1951, area code 516 was assigned to Suffolk and Nassau.[1]
1999–2016: 631
[edit | edit source]On November 1, 1999, area code 631 was created solely for Suffolk County to satisfy the increased need for telephone numbers mainly due to cellular services, while Nassau County retained area code 516.[2] Permissive dialing for numbers terminating in the 631 area across Long Island continued until April 1, 2000, during which both area code may be used to dial destinations in the 631 area. New central office codes in the new NPA could be activated as early as May 8, 2000.[2][3]
2016–present: 631/934 overlay
[edit | edit source]On July 16, 2016, area code 934 was assigned to overlay 631, which was nearing depletion of central office codes. This was the first overlay in an area in the state of New York outside New York City, and required ten-digit dialing for both area codes, effective June 18, 2016.[4]
See also
[edit | edit source]References
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External links
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| North: 203/475, 401, 860/959 | ||
| West: 363/516 | 631/934 | East: Atlantic Ocean |
| South: Atlantic Ocean | ||
| Connecticut area codes: 203/475, 860/959 | ||
| Rhode Island area codes: 401 | ||
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