| 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 |
|---|---|---|---|
| 631-200 | Suffolk | Bayport, NY | Mcimetro Access Transmission Services LLC |
| 631-204 | Suffolk | Southampton, NY | Verizon New York |
| 631-205 | Suffolk | Yaphank, NY | Verizon New York |
| 631-206 | Suffolk | Brightwaters, NY | Verizon New York |
| 631-207 | Suffolk | Patchogue, NY | Verizon New York |
| 631-208 | Suffolk | Riverhead, NY | Verizon New York |
| 631-209 | Suffolk | Shoreham, NY | Verizon New York |
| 631-210 | Suffolk | Islip, NY | Broadview Networks |
| 631-213 | Suffolk | Huntington, NY | Teleport Communications Group |
| 631-216 | Suffolk | East Setauket, NY | Verizon New York |
| 631-217 | Suffolk | Stony Brook, NY | American Network |
| 631-218 | Suffolk | Sayville, NY | Verizon New York |
| 631-219 | Suffolk | Brentwood, NY | Cellco Partnership DBA Verizon Wireless |
| 631-220 | Suffolk | Brentwood, NY | Omnipoint Communications |
| 631-221 | Nassau | Wantagh, NY | Verizon New York |
| 631-223 | Suffolk | Huntington, NY | Xo New York |
| 631-224 | Suffolk | Islip, NY | Verizon New York |
| 631-225 | Suffolk | Lindenhurst, NY | Verizon New York |
| 631-226 | Suffolk | Lindenhurst, NY | Verizon New York |
| 631-227 | Nassau | Farmingdale, NY | Broadview Networks |
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.