| 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 |
|---|---|---|---|
| 631-225 | Lindenhurst | Suffolk | Landline |
| 631-593 | Greenport | Suffolk | Landline |
| 631-462 | Commack | Suffolk | Landline |
| 631-231 | Brentwood | Suffolk | Landline |
| 631-576 | Patchogue | Suffolk | Landline |
| 631-873 | Brentwood | Suffolk | Wireless |
| 631-249 | Farmingdale | Nassau | Landline |
| 631-841 | Amityville | Suffolk | Landline |
| 631-342 | Islandia | Suffolk | Landline |
| 631-724 | Hauppauge | Suffolk | Landline |
| 631-525 | Brentwood | Suffolk | Landline |
| 631-728 | Hampton Bays | Suffolk | Landline |
| 631-464 | Amityville | Suffolk | Landline |
| 631-621 | Saint James | Suffolk | Landline |
| 631-434 | Brentwood | Suffolk | Landline |
| 631-791 | East Setauket | Suffolk | Landline |
| 631-843 | Farmingdale | Nassau | Landline |
| 631-778 | Islandia | Suffolk | Landline |
| 631-251 | Sag Harbor | Suffolk | Landline |
| 631-241 | Brentwood | Suffolk | Wireless |