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US area code · New York

Area code 631

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.

Missed a call from +1 631?

In the 30 days to September 24, 2026, 751 unwanted calls showing a 631 number were reported to the US Federal Trade Commission, 70% of them recorded messages or robocalls. That puts 631 at #93 of 670 area codes reported.

Reducing your debt (credit cards, mortgage, student loans)279
Other267
Dropped call or no message60
Calls pretending to be government, businesses, or family and friends38
Before you call back
  • If you do not know anyone in New York, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 631 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 631 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 631:

Verizon New York, Inc. 230Mcimetro Access Transmission Services LLC 64Omnipoint Communications, Inc. 55Cablevision Lightpath, Inc. 55Level 3 Communications, LLC 53New Cingular Wireless PCS, LLC 49

About 12% of the 799 prefixes in use belong to mobile carriers: a 631 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

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