631 Area Code
The 631 area code is a telephone area code serving Suffolk County, New York, on Long Island.
Federal Data
State Data
County Data
City Data
The 631 area code is a telephone area code serving Suffolk County, New York, on Long Island.
Federal Data
State Data
County Data
City Data
Area code 631 covers all of Suffolk County, New York.
Area code 934 was assigned to overlay 631 on July 16, 2016. This overlay required ten-digit dialing for both area codes, effective June 18, 2016. Both area codes, 631 and 934, serve the same geographic region.
Area code 631 is a general purpose code which was placed in service on November 1, 1999.
Our New York phone number lookup service will analyze the three-digit prefix of any 631 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, New York geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
| Company | Number of Prefixes |
|---|---|
| VERIZON NEW YORK, INC. | 219 |
| CABLEVISION LIGHTPATH, INC. - NY | 75 |
| XO NEW YORK, INC. | 51 |
| LEVEL 3 COMMUNICATIONS, LLC - NY | 43 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 41 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 40 |
| OMNIPOINT COMMUNICATIONS, INC. - NY | 35 |
| SPRINT SPECTRUM, L.P. | 35 |
| TC SYSTEMS, INC. - NY | 31 |
| BROADVIEW NETWORKS, INC. - NY | 20 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - NY | 11 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 11 |
| PEERLESS NETWORK OF NEW YORK, LLC - NY | 11 |
| ONVOY, LLC- NY | 10 |
| USA MOBILITY WIRELESS, INC. | 10 |
| BANDWIDTH.COM CLEC, LLC - NY | 8 |
| METROPCS, INC. | 6 |
| AT&T - LOCAL | 5 |
| PAETEC COMMUNICATIONS, INC. - NY | 5 |
| TELENGY L.L.C. - NY | 5 |
| LOCAL ACCESS LLC - NY | 3 |
| CONVERSENT COMMUNICATIONS OF NEW YORK, LLC - NY | 2 |
| CTC COMMUNICATIONS CORP. - NY | 2 |
| LEVEL 3 TELECOM OF NEW YORK, LP - NY | 2 |
| AMERICAN MESSAGING SERVICES, LLC | 1 |
| EUREKA TELECOM, INC. DBA EUREKA NETWORKS - NY | 1 |
| FISHERS ISLAND TEL. CORP. | 1 |
| HD CARRIER LLC | 1 |
| ONVOY SPECTRUM, LLC | 1 |
| RCN TELECOM SERVICES, INC. - NY | 1 |
| REGIONAL TELEPHONE CORPORATION - NY | 1 |
| VITCOM LLC - NY | 1 |
| WIDE VOICE, LLC - NY | 1 |
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
| Rate Center | Number of Prefixes |
|---|---|
| BRENTWOOD | 117 |
| FARMINGDL | 40 |
| RIVERHEAD | 35 |
| HUNTINGTON | 33 |
| CENTRAISLP | 32 |
| AMITYVILLE | 28 |
| BABYLON | 24 |
| SELDEN | 23 |
| DEER PARK | 22 |
| PATCHOGUE | 22 |
| RONKONKOMA | 21 |
| SMITHTOWN | 18 |
| YAPHANK | 17 |
| PTJEFFERSN | 15 |
| LINDENHST | 14 |
| SAYVILLE | 13 |
| STONYBROOK | 13 |
| BAY SHORE | 12 |
| SOUTHAMPTN | 12 |
| NORTHPORT | 11 |
| W COMMACK | 11 |
| COMMACK | 10 |
| ISLIP | 10 |
| BAYPORT | 8 |
| BELLPORT | 8 |
| E HAMPTON | 8 |
| ATLANTIC | 7 |
| HAMPTNBAYS | 7 |
| KINGS PARK | 7 |
| MIDLAND | 7 |
| SHOREHAM | 7 |
| COLDSPGHBR | 6 |
| EASTPORT | 5 |
| FIREISLAND | 5 |
| ST JAMES | 5 |
| BRIDGEMPTN | 4 |
| CTRMORICHS | 4 |
| MONTAUK PT | 4 |
| ORIENT | 4 |
| SAG HARBOR | 4 |
| WADING RIV | 4 |
| WESTHAMPTN | 4 |
| AMAGANSETT | 3 |
| GREENPORT | 3 |
| MATTITUCK | 3 |
| NASSAUZN09 | 3 |
| PECONIC | 3 |
| SOUTHOLD | 3 |
| WATER MILL | 3 |
| E FIRE IS | 2 |
| JAMESPORT | 2 |
| QUOGUE | 2 |
| FISHERS IS | 1 |
| SHELTER IS | 1 |
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