| 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 |
|---|---|---|---|
| 631-361 | Suffolk | Smithtown, NY | Verizon New York |
| 631-363 | Suffolk | Patchogue, NY | Verizon New York |
| 631-364 | Suffolk | Stony Brook, NY | Broadview Networks |
| 631-365 | Suffolk | Brentwood, NY | Sprint Spectrum L.p. |
| 631-366 | Suffolk | Smithtown, NY | Verizon New York |
| 631-367 | Suffolk | Cold Spring Harbor, NY | Verizon New York |
| 631-368 | Suffolk | Commack, NY | Verizon New York |
| 631-369 | Suffolk | Riverhead, NY | Verizon New York |
| 631-370 | Nassau | Farmingdale, NY | Teleport Communications Group |
| 631-371 | Suffolk | St James, NY | Sprint Spectrum L.p. |
| 631-373 | Suffolk | Brentwood, NY | Usa Mobility Wireless |
| 631-374 | Suffolk | Brentwood, NY | New Cingular Wireless PCS - DC |
| 631-375 | Suffolk | Riverhead, NY | New Cingular Wireless PCS - DC |
| 631-376 | Suffolk | Babylon, NY | Verizon New York |
| 631-377 | Suffolk | Southampton, NY | New Cingular Wireless PCS - DC |
| 631-378 | Suffolk | Shoreham, NY | Level 3 Communications |
| 631-379 | Suffolk | Brentwood, NY | Cellco Partnership DBA Verizon Wireless |
| 631-380 | Suffolk | Huntington, NY | Teleport Communications Group |
| 631-382 | Suffolk | Smithtown, NY | Verizon New York |
| 631-383 | Suffolk | Bay Shore, NY | Sprint Spectrum L.p. |
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.