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Area code 631

Area code 631 serves New York, including Brentwood, Farmingdale and Riverhead (Eastern time). It has been in service since November 1, 1999 and shares its area with 934.

Numbers starting with 631 drew 2,059 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 902 complaints to the FCC since November 2023. The number on your screen can be faked, so a 631 number proves nothing about where a call came from.

Location
New YorkNew York-Newark-Jersey City, NY-NJ Metropolitan Statistical Area
Time zone
Eastern
In service since
November 1, 1999Created from 516
Overlay
Same area as 934
Local calls
Dial 10 digitsArea code needed, even next door
Exchanges in use
782 of 792held by 39 carriers
Projected to run out
1Q 2080NANPA forecast 2026.2

Complaints about 631 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 631. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

2,059

FCC complaints since November 2023

902

Different 631 numbers reported

2,723

FCC complaints naming a 631 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 20237
December 202317
January 202416
February 202413
March 20247
April 202414
May 202415
June 202416
July 202417
August 202417
September 202410
October 202414
November 202415
December 20247
January 202515
February 202529
March 202515
April 202522
May 202532
June 202534
July 202540
August 202545
September 202549
October 20252
November 202515
December 202531
January 202642
February 202651
March 202643
April 202628
May 202642
June 202637
July 202631
August 202616
September 202634
October 202638

What people said 631 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 1,377 of 2,059 reports were robocalls.

Show as a table
SubjectReports
Other835
Reducing your debt (credit cards, mortgage, student loans)666
Dropped call or no message134
Calls pretending to be government, businesses, or family and friends126
Medical and prescriptions60
Warranties and protection plans25

Places served by 631

NANPA lists 54 rate centers for 631. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Brentwood127
  • Farmingdale42
  • Riverhead40
  • Huntington34
  • Central Islip32
  • Amityville31
  • Babylon28
  • Deer Park27
  • Patchogue26
  • Ronkonkoma24
  • Selden24
  • Smithtown20
  • Yaphank17
  • Lindenhurst15
  • Port Jefferson15
  • Stony Brook15
  • Bay Shore14
  • Sayville14
  • West Commack13
  • Nassau Zone 0912
  • Northport12
  • Southampton12
  • Commack11
  • Islip11
Show all 54 rate centers

Bayport, East Hampton, Atlantic, Bellport, Midland, Shoreham, Cold Spring Harbor, Eastport, Hampton Bays, Kings Park, Center Moriches, Fire Island, Sag Harbor, Saint James, Greenport, Mattituck, Montauk Point, Orient, Wading River, Westhampton, Amagansett, Bridgehampton, Jamesport, Quogue, Southold, Water Mill, East Fire Island, Peconic, Shelter Island, Fishers Island.

Phone companies holding 631 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 77% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 39 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Verizon New York, Inc.228
Mcimetro Access Transmission Services LLC - NY64
Cablevision Lightpath, Inc. - NY55
Omnipoint Communications, Inc. - NY55
Level 3 Communications, LLC - NY53
New Cingular Wireless PCS, LLC - DC49
Cellco Partnership dba Verizon Wireless - NY44
Onvoy, LLC- NY37

When today's 631 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
200136
200234
200313
200412
200515
200620
20076
20085
20099
201012
201114
201219
201315
201411
20158
201611
20173
20189
20195
202010
20216
20223
20232
20244
20253

Check a 631 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in New York

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show