| 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 |
|---|---|---|---|
| 631-759 | Huntington | Suffolk | Landline |
| 631-972 | Brentwood | Suffolk | Landline |
| 631-697 | Huntington | Suffolk | Wireless |
| 631-798 | Massapequa | Nassau | Landline |
| 631-994 | Brentwood | Suffolk | Wireless |
| 631-377 | Water Mill | Suffolk | Wireless |
| 631-366 | Hauppauge | Suffolk | Landline |
| 631-732 | Selden | Suffolk | Landline |
| 631-938 | East Setauket | Suffolk | Landline |
| 631-940 | North Babylon | Suffolk | Landline |
| 631-689 | Stony Brook | Suffolk | Landline |
| 631-238 | East Hampton | Suffolk | Landline |
| 631-331 | Port Jefferson Station | Suffolk | Landline |
| 631-582 | Islandia | Suffolk | Landline |
| 631-831 | Brentwood | Suffolk | Wireless |
| 631-437 | North Babylon | Suffolk | Landline |
| 631-254 | North Babylon | Suffolk | Landline |
| 631-737 | Islandia | Suffolk | Landline |
| 631-320 | Selden | Suffolk | Wireless |
| 631-876 | Southold | Suffolk | Landline |