Area Code Box

Area code 631

Where is area code 631?

Brentwood, Farmingdale and Riverhead, New York

Local time: … (Eastern Time)

StateNew York
CountryUnited States
Main citiesBrentwood, Farmingdale and Riverhead
Time zoneEastern Time
Overlay area codes934
In service since1999 (created from 516)
Assigned prefixes782
Dialing format(631) XXX-XXXX · +1 631 XXX XXXX from abroad

Look up a 631 number

Enter a 3-digit area code or a full 10-digit number.

Cities and towns in area code 631

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 631.

Phone companies in area code 631

The carriers that hold the most 631 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

PrefixesCarrier
228Verizon New York
65Mcimetro Access Transmission Services
55Omnipoint Communications (T-Mobile)
55Cablevision Lightpath
53Level 3 Communications
49New Cingular Wireless PCS (AT&T)
44Verizon Wireless
37Onvoy, Llc- Ny

All 782 prefixes in area code 631

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Area codes that overlay 631

Questions

Where is area code 631?
Area code 631 is in New York. It serves Brentwood, Farmingdale, Riverhead, Huntington and Centraislp and 53 other cities and towns.
What time zone is area code 631 in?
Area code 631 uses Eastern Time.
What area codes overlay 631?
934 serves the same area as 631. New numbers in the area can get any of these codes, which is why local calls need all 10 digits.
Is a call from area code 631 a scam?
The area code alone doesn’t tell you. Most calls from 631 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 631 number, let it go to voicemail.
When did area code 631 start?
631 went into service in 1999. It was created from area code 516.
Can a 631 number be outside New York?
Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 631 caller can be anywhere.

Other area codes in New York

Area codeMain cities
212New York
315Syracuse, Utica and Watertown
329Poughkeepsie, Monroe and Carmel
332New York
347Brooklyn, Bronx and Jamaica
363Nassauzn02, Westbury and Syosset
465Brooklyn, Bronx and New York
516Westbury, Nassauzn02 and Plainview
518Albany, Schenectady and Hudson Falls
585Rochester, Pittsford and Batavia
607Binghamton, Ithaca and Elmira
624Buffalo, North Tonawanda and Jamestown
646New York
680Syracuse, Lyons and Utica
716Buffalo, North Tonawanda and Jamestown
718Brooklyn, Bronx and Jamaica
838Albany, Schenectady and Johnstown
845Poughkeepsie, Newburgh and Pomona
914White Plains, Yonkers and Mount Kisco
917New York, Brooklyn and Bronx
929Bronx, Brooklyn and Jamaica