─────── § 04. NPA RECORD · 631 · FOLIO 0433 OF 0801 ──────────────
631
United States NPA Record
Area code 631 was created in 1999 as a geographic split from 516 to serve Suffolk County, New York, due to increased demand for telephone numbers including cellular services.
Area code 631 was created in 1999 as a geographic split from 516 to serve Suffolk County, New York, due to increased demand for telephone numbers including cellular services.
IN SERVICEFirst record · 1999
§ 04.05Event Summary
mandatory dialing · 2permissive dialing · 2activated · 1other · 1relief planned · 1split · 1
§ 04.06
Documentary Record · 10 events
CHRONOLOGICAL ORDER
1999-07-22
other
Geographic Split of 516 (New York) Numbering Plan Area (NPA); addition of 631 NPA
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1999-11-01
split
NPA 631 split from 516 for Suffolk County
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2000-04-01
mandatory dialing
Mandatory use of area code 631 in Suffolk County
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2000-04-01
permissive dialing
Permissive dialing period for 631 begins
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2000-05-08
activated
New central office codes activated in 631
New central office codes in area code 631 could be activated starting May 8, 2000, expanding numbering capacity in Suffolk County following the split from 516.
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2001-09-11
permissive dialing
Extended Permissive Dialing Ends for 516/631 NPAs (New York)
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2015-02-19
NPA 934 overlay on 631 announced
NPA 934 to Overlay NPA 631 (New York)
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2016-06-18
mandatory dialing
Mandatory ten-digit dialing for NPAs 631 and 934
Ten-digit dialing became mandatory for both area codes 631 and 934 in Suffolk County on June 18, 2016, coinciding with the introduction of the 934 overlay.
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2016-07-16
NPA 934 overlays 631 in Suffolk County
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2016-07-16
relief planned
Overlay area code 934 assigned to 631
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