| District of New York area codes: 631 | |
|---|---|
| Country | United States |
| State/Province | New York |
| Major City | Deer Park |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 631-320 | Suffolk | Selden, NY | Cablevision Lightpath |
| 631-321 | Suffolk | Babylon, NY | Verizon New York |
| 631-322 | Suffolk | Brentwood, NY | Usa Mobility Wireless |
| 631-323 | Suffolk | Greenport, NY | Verizon New York |
| 631-324 | Suffolk | East Hampton, NY | Verizon New York |
| 631-325 | Suffolk | Eastport, NY | Verizon New York |
| 631-326 | Suffolk | Commack, NY | Xo New York |
| 631-327 | Suffolk | Huntington, NY | New Cingular Wireless PCS - DC |
| 631-328 | Suffolk | Bay Shore, NY | Broadview Networks |
| 631-329 | Suffolk | East Hampton, NY | Verizon New York |
| 631-330 | Nassau | Farmingdale, NY | Cablevision Lightpath |
| 631-331 | Suffolk | Port Jefferson, NY | Verizon New York |
| 631-332 | Suffolk | Brentwood, NY | New Cingular Wireless PCS - DC |
| 631-333 | Suffolk | Greenport, NY | Broadview Networks |
| 631-334 | Suffolk | Central Islip, NY | Sprint Spectrum L.p. |
| 631-335 | Suffolk | Brentwood, NY | Cellco Partnership DBA Verizon Wireless |
| 631-336 | Suffolk | Brentwood, NY | Metro PCS |
| 631-337 | Suffolk | Sayville, NY | Global Crossing Local Services-ny |
| 631-338 | Suffolk | Brentwood, NY | Cellco Partnership DBA Verizon Wireless |
| 631-339 | Suffolk | Brentwood, NY | Bandwidth.com Clec |
There are 714 prefixes, In the code area, the major cities are Bay Shore, NY;Brentwood, NY;Centereach, NY;Central. The major city is Deer Park.