| 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 |
|---|---|---|---|
| 631-289 | Suffolk | Patchogue, NY | Verizon New York |
| 631-291 | Suffolk | Brentwood, NY | Sprint Spectrum L.p. |
| 631-292 | Suffolk | Kings Park, NY | Level 3 Communications |
| 631-293 | Nassau | Farmingdale, NY | Verizon New York |
| 631-294 | Suffolk | Yaphank, NY | Sprint Spectrum L.p. |
| 631-295 | Suffolk | Yaphank, NY | Global Crossing Local Services-ny |
| 631-296 | Suffolk | Water Mill, NY | Cablevision Lightpath |
| 631-297 | Suffolk | Central Islip, NY | Paetec Communications |
| 631-298 | Suffolk | Mattituck, NY | Verizon New York |
| 631-299 | Suffolk | Brentwood, NY | Broadview Networks |
| 631-300 | Suffolk | Brentwood, NY | Verizon New York |
| 631-302 | Suffolk | West Sayville, NY | Xo New York |
| 631-306 | Suffolk | Brentwood, NY | Global Crossing Local Services-ny |
| 631-307 | Suffolk | Patchogue, NY | Local Access LLC |
| 631-312 | Suffolk | Patchogue, NY | Teleport Communications Group |
| 631-315 | Suffolk | Mattituck, NY | Cablevision Lightpath |
| 631-316 | Nassau | Farmingdale, NY | Cellco Partnership DBA Verizon Wireless |
| 631-317 | Suffolk | Patchogue, NY | New Cingular Wireless PCS - DC |
| 631-318 | Suffolk | East Hampton, NY | Mcimetro Access Transmission Services LLC |
| 631-319 | Suffolk | Sayville, NY | Verizon New York |
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.