| 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 |
|---|---|---|---|
| 631-971 | Commack | Suffolk | Landline |
| 631-360 | Hauppauge | Suffolk | Landline |
| 631-726 | Hampton Bays | Suffolk | Landline |
| 631-904 | Islandia | Suffolk | Landline |
| 631-847 | Farmingdale | Nassau | Landline |
| 631-677 | Sayville | Suffolk | Landline |
| 631-664 | Islandia | Suffolk | Wireless |
| 631-832 | Blue Point | Suffolk | Landline |
| 631-935 | Huntington | Suffolk | Landline |
| 631-540 | Suffolk | Suffolk | - |
| 631-650 | Islip | Suffolk | Landline |
| 631-207 | Patchogue | Suffolk | Landline |
| 631-325 | Eastport | Suffolk | Landline |
| 631-848 | Brentwood | Suffolk | Wireless |
| 631-270 | Farmingdale | Nassau | Landline |
| 631-422 | West Babylon | Suffolk | Landline |
| 631-469 | Islandia | Suffolk | Wireless |
| 631-339 | Brentwood | Suffolk | Landline |
| 631-575 | Brentwood | Suffolk | Wireless |
| 631-374 | Brentwood | Suffolk | Wireless |