| 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 |
|---|---|---|---|
| 631-929 | Shoreham | Suffolk | Landline |
| 631-712 | Farmingdale | Nassau | Landline |
| 631-502 | Mattituck | Suffolk | Landline |
| 631-233 | Brentwood | Suffolk | Landline |
| 631-489 | Commack | Suffolk | Landline |
| 631-230 | East Hampton | Suffolk | Landline |
| 631-820 | Islandia | Suffolk | Landline |
| 631-722 | Riverhead | Suffolk | Landline |
| 631-774 | Brentwood | Suffolk | Wireless |
| 631-850 | Commack | Suffolk | Landline |
| 631-867 | Lindenhurst | Suffolk | Landline |
| 631-486 | Commack | Suffolk | Landline |
| 631-647 | Brightwaters | Suffolk | Landline |
| 631-459 | Brentwood | Suffolk | Wireless |
| 631-849 | Shoreham | Suffolk | Landline |
| 631-367 | Cold Spring Harbor | Suffolk | Landline |
| 631-579 | Brentwood | Suffolk | Wireless |
| 631-735 | Peconic | Suffolk | Landline |
| 631-330 | Farmingdale | Nassau | Landline |
| 631-256 | Sayville | Suffolk | Landline |