| 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 |
|---|---|---|---|
| 631-708 | Brentwood | Suffolk | Landline |
| 631-845 | Farmingdale | Nassau | Landline |
| 631-920 | Deer Park | Suffolk | Landline |
| 631-770 | Farmingdale | Nassau | Landline |
| 631-913 | Islandia | Suffolk | Landline |
| 631-909 | Center Moriches | Suffolk | Landline |
| 631-747 | Brentwood | Suffolk | Wireless |
| 631-635 | West Babylon | Suffolk | Wireless |
| 631-307 | Patchogue | Suffolk | Landline |
| 631-224 | Islip | Suffolk | Landline |
| 631-890 | Blue Point | Suffolk | Landline |
| 631-519 | Sayville | Suffolk | Landline |
| 631-659 | Cold Spring Harbor | Suffolk | Landline |
| 631-493 | Commack | Suffolk | Landline |
| 631-356 | Brentwood | Suffolk | Wireless |
| 631-556 | Brentwood | Suffolk | Wireless |
| 631-623 | Commack | Suffolk | Landline |
| 631-670 | Commack | Suffolk | Landline |
| 631-302 | Sayville | Suffolk | Landline |
| 631-872 | Brentwood | Suffolk | Wireless |