631 is the North American telephone area code for the state of New York, including the cities of Bay Shore, Brentwood, Centereach, Central Islip, Commack, Copiague, Coram, Deer Park, Dix Hills, East Northport, East Patchogue, Hauppauge, Holbrook, Huntington Station, Islip, Lindenhurst, Medford, Ronkonkoma, Selden, Shirley, Smithtown, West Babylon, and West Islip.
Search Any Number, Get Name, Address, Pic and More!
| Prefix | Primary City | Company | County | Usage |
|---|---|---|---|---|
| 631-200-#### | Bayport, NY | Mcimetro Access Transmission Services LLC | Suffolk | Landline |
| 631-204-#### | Southampton, NY | Verizon New York | Suffolk | Landline |
| 631-205-#### | Yaphank, NY | Verizon New York | Suffolk | Landline |
| 631-206-#### | Brightwaters, NY | Verizon New York | Suffolk | Landline |
| 631-207-#### | Patchogue, NY | Verizon New York | Suffolk | Landline |
| 631-208-#### | Riverhead, NY | Verizon New York | Suffolk | Landline |
| 631-209-#### | Shoreham, NY | Verizon New York | Suffolk | Landline |
| 631-210-#### | Islip, NY | Broadview Networks | Suffolk | Landline |
| 631-213-#### | Huntington, NY | Teleport Communications Group | Suffolk | Landline |
| 631-216-#### | East Setauket, NY | Verizon New York | Suffolk | Landline |
| 631-217-#### | Stony Brook, NY | American Network | Suffolk | Landline |
| 631-218-#### | Sayville, NY | Verizon New York | Suffolk | Landline |
| 631-219-#### | Brentwood, NY | Cellco Partnership DBA Verizon Wireless | Suffolk | Cell Number |
| 631-220-#### | Brentwood, NY | Omnipoint Communications | Suffolk | Cell Number |
| 631-221-#### | Wantagh, NY | Verizon New York | Nassau | Landline |
| 631-223-#### | Huntington, NY | Xo New York | Suffolk | Landline |
| 631-224-#### | Islip, NY | Verizon New York | Suffolk | Landline |
| 631-225-#### | Lindenhurst, NY | Verizon New York | Suffolk | Landline |
| 631-226-#### | Lindenhurst, NY | Verizon New York | Suffolk | Landline |
| 631-227-#### | Farmingdale, NY | Broadview Networks | Nassau | Landline |
| 631-228-#### | Shoreham, NY | Xo New York | Suffolk | Landline |
| 631-229-#### | Amityville, NY | Xo New York | Suffolk | Landline |
| 631-231-#### | Brentwood, NY | Verizon New York | Suffolk | Landline |
| 631-232-#### | Central Islip, NY | Verizon New York | Suffolk | Landline |
| 631-233-#### | Brentwood, NY | Verizon New York | Suffolk | Landline |
| 631-234-#### | Central Islip, NY | Verizon New York | Suffolk | Landline |
| 631-235-#### | Brentwood, NY | Cellco Partnership DBA Verizon Wireless | Suffolk | Cell Number |
| 631-236-#### | Brentwood, NY | Broadwing Communications | Suffolk | Landline |
| 631-237-#### | Water Mill, NY | Cablevision Lightpath | Suffolk | Landline |
| 631-238-#### | Montauk, NY | Cablevision Lightpath | Suffolk | Landline |
| 631-239-#### | Northport, NY | Teleport Communications Group | Suffolk | Landline |
| 631-240-#### | Smithtown, NY | Broadwing Communications | Suffolk | Landline |
| 631-241-#### | Brentwood, NY | Cellco Partnership DBA Verizon Wireless | Suffolk | Cell Number |
| 631-242-#### | Deer Park, NY | Verizon New York | Suffolk | Landline |
| 631-243-#### | Deer Park, NY | Verizon New York | Suffolk | Landline |
| 631-244-#### | Sayville, NY | Verizon New York | Suffolk | Landline |
| 631-245-#### | Brentwood, NY | New Cingular Wireless PCS - DC | Suffolk | Cell Number |
| 631-246-#### | East Setauket, NY | Verizon New York | Suffolk | Landline |
| 631-247-#### | Farmingdale, NY | Teleport Communications Group | Nassau | Landline |
| 631-249-#### | Farmingdale, NY | Verizon New York | Nassau | Landline |
| 631-251-#### | Sag Harbor, NY | Broadwing Communications | Suffolk | Landline |
| 631-252-#### | Brentwood, NY | Cellco Partnership DBA Verizon Wireless | Suffolk | Cell Number |
| 631-253-#### | Deer Park, NY | Verizon New York | Suffolk | Landline |
| 631-254-#### | Deer Park, NY | Verizon New York | Suffolk | Landline |
| 631-255-#### | Riverhead, NY | New Cingular Wireless PCS - DC | Suffolk | Cell Number |
| 631-256-#### | Sayville, NY | Teleport Communications Group | Suffolk | Landline |
| 631-258-#### | Brentwood, NY | Cellco Partnership DBA Verizon Wireless | Suffolk | Cell Number |
| 631-259-#### | Southampton, NY | Verizon New York | Suffolk | Landline |
| 631-261-#### | Northport, NY | Verizon New York | Suffolk | Landline |
| 631-262-#### | Northport, NY | Verizon New York | Suffolk | Landline |