| 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 |
|---|---|---|---|
| 631-560 | Brentwood | Suffolk | Wireless |
| 631-866 | Bellport | Suffolk | Landline |
| 631-706 | East Setauket | Suffolk | Landline |
| 631-723 | Hampton Bays | Suffolk | Landline |
| 631-429 | Lindenhurst | Suffolk | Landline |
| 631-383 | Brightwaters | Suffolk | Wireless |
| 631-685 | Hampton Bays | Suffolk | Landline |
| 631-264 | Amityville | Suffolk | Landline |
| 631-800 | Water Mill | Suffolk | Landline |
| 631-409 | Seaford | Nassau | Landline |
| 631-324 | Sag Harbor | Suffolk | Landline |
| 631-407 | Southold | Suffolk | Landline |
| 631-808 | Northport | Suffolk | Landline |
| 631-897 | Huntington | Suffolk | Wireless |
| 631-992 | Wantagh | Nassau | Landline |
| 631-740 | Riverhead | Suffolk | Landline |
| 631-566 | Riverhead | Suffolk | Landline |
| 631-743 | East Setauket | Suffolk | Landline |
| 631-265 | Hauppauge | Suffolk | Landline |
| 631-796 | Brentwood | Suffolk | Wireless |