Area code
Area code 631 — Suffolk County, NY
New York · in service since November 1, 1999
Area code 631 covers Suffolk County, NY. It is an overlay: 934 serves the same area, so neighbors can have different area codes.
Overlay, same area: 934
Local time in Suffolk County
Spam reports from Sep 23 – Oct 22, 2026
Average #117 of 461 codes
671 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneEastern Time
- Local calls10 digits
- Prefixes799 assigned
- Runs out~3Q 2079
- Unwanted call?Block & report
Spam call reports about 631 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 49 |
| Sep 14 | 190 |
| Sep 21 | 133 |
| Sep 28 | 153 |
| Oct 5 | 154 |
| Oct 12 | 138 |
| Oct 19 (4 days) | 135 |
Compared with all codes
- Robocalls
- 76%all codes 75%
- Callers with the same code
- 24%all codes 35%
- Rank by complaints
- #117of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 27019 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 305 32% | |
| Calls pretending to be government, businesses, or family and friends | 67 7% | |
| Dropped call or no message | 55 6% | |
| Medical & prescriptions | 22 2% | |
| Warranties & protection plans | 15 2% | |
| Energy, solar, & utilities | 6 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| New York | 343 36% | |
| Florida | 67 7% | |
| California | 63 7% | |
| Pennsylvania | 30 3% | |
| Illinois | 28 3% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 631 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| BRENTWOOD | Brentwood | Suffolk County | 127 |
| FARMINGDL | Farmingdale | Nassau County | 42 |
| RIVERHEAD | Riverhead | Suffolk County | 40 |
| HUNTINGTON | Huntington | Suffolk County | 34 |
| CENTRAISLP | Central Islip | Suffolk County | 32 |
| AMITYVILLE | Amityville | Suffolk County | 31 |
| BABYLON | Babylon | Suffolk County | 28 |
| DEER PARK | Deer Park | Suffolk County | 27 |
| PATCHOGUE | Patchogue | Suffolk County | 26 |
| RONKONKOMA | Ronkonkoma | Suffolk County | 24 |
Plus 44 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
Is 631 running out of numbers?
Previous forecast (October 2025): 2073, moved later by 6 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 631 prefixes
The five largest of 40 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Verizon New York, Inc. | 230 29% | |
| Mcimetro Access Transmission Services LLC | 65 8% | |
| Cablevision Lightpath, Inc. | 55 7% | |
| Omnipoint Communications, Inc. | 55 7% | |
| Level 3 Communications, LLC | 53 7% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 631
What area code is 631?
A New York area code, in service since November 1, 1999.
Where is 631 area code, and what time zone is it in?
Suffolk County, NY; Eastern Time.
Why am I getting spam calls from 631?
671 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 631 get a new area code?
NANPA forecasts exhaust in 3Q 2079; no relief planning listed.