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US area code · New York

631 area code

Where the 631 area code is, its overlay and how to dial a +1 631 number from anywhere.

CoversNorth Bay Shore, New YorkTime zoneEastern (ET)TypeOverlay
Quick answer

The 631 area code is in North Bay Shore, New York, United States (Eastern (ET)). To call from abroad: +1 631 555-0123. It is an overlay, so all 10 digits are dialled.

StateNew York
Main areaNorth Bay Shore
Time zoneEastern (ET)
TypeOverlay
10-digit dialingRequired
In service since05-May-1999

The 631 area code is a geographic North American Numbering Plan (NANP) code covering North Bay Shore, New York. It has been in service since 05-May-1999 and sits in the Eastern (ET) time zone.

Overlay 631 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

631516934

How to dial a 631 number

From abroad+1 631 555-0123
Within the US / Canada1 631 555-0123
Locally (same area)631 555-0123

Cities in the 631 area code

A 631 number is usually in one of these places in New York — 1 county.

Brentwood SuffolkCentereach SuffolkCentral Islip SuffolkCommack SuffolkCopiague SuffolkCoram SuffolkDeer Park SuffolkDix HillsEast Northport SuffolkEast PatchogueHauppauge SuffolkHolbrook SuffolkHuntington Station SuffolkMedford SuffolkNorth Bay ShoreNorth LindenhurstRonkonkoma SuffolkSelden SuffolkShirley SuffolkSmithtown SuffolkWest Babylon SuffolkWest Islip Suffolk

Other New York area codes

212315329332347363465516518585607624646680716718

Frequently asked questions

Where is the 631 area code?

The 631 area code is in North Bay Shore, New York, United States (Eastern (ET)).

Is 631 an overlay area code?

Yes. 631 overlays the same region as 516, 934, so callers dial all 10 digits.

Do I have to dial 10 digits for 631?

Yes — dial the area code plus the seven-digit number.

How do I call a 631 number from another country?

Dial your exit code (or +), then 1, then 631, then the number: +1 631 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 631 number does not pinpoint a street or ZIP code.

Number holders in area code 631

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 799 prefixes are in use in 631, shared by 41 companies. The largest holders:

CompanyPrefixesShare
Verizon New York, Inc.23029%
Mcimetro Access Transmission Services LLC648%
Omnipoint Communications, Inc.557%
Cablevision Lightpath, Inc.557%
Level 3 Communications, LLC537%
New Cingular Wireless PCS, LLC496%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 631 numbers

Reports to the FTC, last 30 days
751
Recorded messages or robocalls
70%
Rank among area codes
#93 of 670
Most reported subjects
Reducing your debt (credit cards, mortgage, student loans) (279)
Other (267)
Dropped call or no message (60)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 631 — cities & rate centres

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