New York area code
Area code 631
631 is a New York area code covering Suffolk County, Long Island. Check a 631 number below to see if it is mobile, landline or VoIP, and which carrier it is with today.
Verdicts describe reachability. They are not compliance checks.
- State
- New York
- Exchanges in use
- 782
- Thousands-blocks assigned
- 5,694
- Carriers holding numbers
- 51
An exchange is the three digits after the area code, 10,000 numbers. A thousands-block is 1,000 of them, assigned to a carrier on its own.
Rate centres in 631
A rate centre is the local area a number belongs to. Names are as NANPA files them, often abbreviated. The 12 with the most exchanges, of 54.
| Rate centre (as filed) | Exchanges |
|---|---|
| BRENTWOOD | 127 |
| FARMINGDL | 42 |
| RIVERHEAD | 40 |
| HUNTINGTON | 34 |
| CENTRAISLP | 32 |
| AMITYVILLE | 31 |
| BABYLON | 28 |
| DEER PARK | 27 |
| PATCHOGUE | 26 |
| RONKONKOMA | 24 |
| SELDEN | 24 |
| SMITHTOWN | 20 |
Carriers 631 numbers were assigned to
The carrier NANPA lists for each exchange and thousands-block. A number can be ported to another carrier after it is assigned, so check the number itself to see its carrier today.
How a port changes the carrier on your list
| Carrier (as filed) | Exchanges | Thousands-blocks |
|---|---|---|
| VERIZON NEW YORK, INC. | 228 | 661 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 64 | 358 |
| OMNIPOINT COMMUNICATIONS, INC. - NY | 55 | 507 |
| CABLEVISION LIGHTPATH, INC. - NY | 55 | 218 |
| LEVEL 3 COMMUNICATIONS, LLC - NY | 53 | 236 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 49 | 409 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 44 | 450 |
| ONVOY, LLC- NY | 37 | 635 |
| TC SYSTEMS, INC. - NY | 34 | 85 |
| PAETEC ITEL, LLC | 32 | 258 |
Questions about this area code
Where is area code 631?
631 is a New York area code covering Suffolk County, Long Island. NANPA's report lists 782 exchanges in use across 54 rate centres.
Is 631 a mobile or a landline area code?
Both. An area code doesn't decide the line type: mobile, landline and VoIP numbers all use 631, and numbers move between carriers. Check the number itself to see what it is today.
Which area codes overlay 631?
934 has numbers in at least half of the same places as 631, so a new number there can get any of these area codes.
Can you tell me who owns a 631 number?
No. NumberLookup shows whether a number is valid, its line type, its carrier and its region, never the person or business behind it.
Source: NANPA's public central office code and thousands-block reports, refreshed weekly. Carriers are the ones the numbers were assigned to, not necessarily today's, and never the person who uses a number.
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