| General Information about Area Code 631 | |
|---|---|
| Country | United States |
| State / Province / Territory | New York |
| Major City | Huntington |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 631-280 | Brentwood | Suffolk | Wireless |
| 631-830 | Riverhead | Suffolk | Landline |
| 631-373 | Brentwood | Suffolk | Wireless |
| 631-355 | Brentwood | Suffolk | Wireless |
| 631-855 | North Babylon | Suffolk | Landline |
| 631-853 | Islandia | Suffolk | Landline |
| 631-227 | Farmingdale | Nassau | Landline |
| 631-457 | Huntington | Suffolk | Landline |
| 631-479 | Huntington | Suffolk | Landline |
| 631-816 | Yaphank | Suffolk | Wireless |
| 631-782 | North Babylon | Suffolk | Landline |
| 631-844 | Farmingdale | Nassau | Landline |
| 631-384 | Selden | Suffolk | Wireless |
| 631-969 | Bay Shore | Suffolk | Landline |
| 631-441 | Brentwood | Suffolk | Wireless |
| 631-790 | Patchogue | Suffolk | Wireless |
| 631-912 | Northport | Suffolk | Landline |
| 631-297 | Islandia | Suffolk | Landline |
| 631-505 | Lindenhurst | Suffolk | Landline |
| 631-406 | Hauppauge | Suffolk | Landline |