631 area code: location, overlays and numbers
In the US, area code 631 has served Long Island, New York since 1999, and it shares an overlay with 934.
- Location
- Long Island, New York
- Service began
- 1999
- Local time zone
- The Eastern time zone
- Overlay
- 934
- Calls inside the area
- 10-digit dialing
- The rate centres
- 53
- Expected exhaust
- 2079
- Code for the country
- +1 (United States)
Source: NANPA public reports, the area code report and the rate-centre report, file dated 11/01/2026; for the exhaust year, see NANPA projections 2026-1 (April 2026). We are not an official NANPA site.
Getting a 631 number
Two paths take you to a 631 number. With a provider, a new number comes with the plan: the provider assigns it at sign-up from the pool it holds in the code. Sellers list numbers they already hold, often ones with a pattern, at a one-time price. After that, you transfer the number to a provider.
Providers ranked by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers listing local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
From some sellers and providers, we may earn a referral fee. The order stays by first-year cost no matter what. How we earn
Places in the 631 area code
For 631, NANPA lists 53 rate centres. Each marks a local calling area, and numbers are assigned there:
Amagansett, Atlantic, Bay Shore, Bellport, Bridgehampton, Cold Spring Harbor, Center Moriches, East Fire Island, Eastport, Fire Island, Greenport, Hampton Bays, Islip, Kings Park, Midland, Northport, Peconic, Quogue, Ronkonkoma, Sayville, Shelter Island, Smithtown, Southold, Stony Brook, Wading River, Westhampton, Amityville, Babylon, Bayport, Brentwood, Central Islip, Commack, Deer Park, East Hampton, Farmingdale, Fishers Island, Huntington, Jamesport, Lindenhurst, Mattituck, Montauk Point, Orient, Patchogue, Port Jefferson, Riverhead, Sag Harbor, Selden, Shoreham, Southampton, Saint James, West Commack, Water Mill, Yaphank.
Area codes related to this one
The same area and the same numbers pool: 934. Any of these codes can give you a new number in this area, so ask for the one you want.
More codes in New York: 212, 315, 518, 716, 914, 516, 607, 718, 917, 646, 347, 845, 585, 929, 680, 332, 838, 363, 329, 624 and 465.
Guides by city: Long Island area codes.
631 area code questions
What area does area code 631 cover?
Near New York-Newark-Jersey City, NY-NJ, area code 631 rings across Long Island, New York.
Which country code does a 631 number use?
+1. Because 631 belongs to the North American Numbering Plan, calling from abroad means dialling +1 631 and the 7-digit number.
What time is it in the 631 area code?
Area code 631 uses Eastern time.
Who places calls using a 631 number?
This code covers anyone with one of its numbers: homes, mobiles, local businesses, plus callers who fake a local number. On your screen, a 631 number shows where that number was assigned, not the identity of the caller.