| 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 |
|---|---|---|---|
| 631-754 | Northport | Suffolk | Landline |
| 631-794 | Farmingdale | Nassau | Landline |
| 631-927 | Garden City | Nassau | Landline |
| 631-368 | Commack | Suffolk | Landline |
| 631-822 | Islandia | Suffolk | Landline |
| 631-417 | Plainview | Nassau | Landline |
| 631-365 | Brentwood | Suffolk | Wireless |
| 631-446 | Islip | Suffolk | Landline |
| 631-258 | Brentwood | Suffolk | Wireless |
| 631-240 | Hauppauge | Suffolk | Landline |
| 631-605 | Patchogue | Suffolk | Wireless |
| 631-589 | Sayville | Suffolk | Landline |
| 631-821 | Shoreham | Suffolk | Landline |
| 631-549 | Huntington | Suffolk | Landline |
| 631-468 | Islandia | Suffolk | Landline |
| 631-543 | Commack | Suffolk | Landline |
| 631-287 | Hampton Bays | Suffolk | Landline |
| 631-210 | Islip | Suffolk | Landline |
| 631-405 | Riverhead | Suffolk | Landline |
| 631-317 | Patchogue | Suffolk | Wireless |