| District of Massachusetts area codes: 617 | |
|---|---|
| Country | United States |
| State/Province | Massachusetts |
| Major City | Boston |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 617-264 | Norfolk | Brookline, MA | Verizon New England Inc. |
| 617-265 | Suffolk | Dorchester, MA | Verizon New England Inc. |
| 617-266 | Suffolk | Boston, MA | Verizon New England Inc. |
| 617-267 | Suffolk | Boston, MA | Verizon New England Inc. |
| 617-268 | Suffolk | S Boston, MA | Verizon New England Inc. |
| 617-269 | Suffolk | S Boston, MA | Verizon New England Inc. |
| 617-270 | Suffolk | Chelsea, MA | Sprint Spectrum L.p. |
| 617-271 | Suffolk | East Boston, MA | Sprint Spectrum L.p. |
| 617-272 | Suffolk | Boston, MA | Global Crossing Local Services-ma |
| 617-273 | Middlesex | Malden, MA | Broadwing Communications |
| 617-274 | Norfolk | Brookline, MA | Paetec Communications |
| 617-275 | Suffolk | Boston, MA | Level 3 Communications |
| 617-276 | Suffolk | Hyde Park, MA | Rcn Telecom Services |
| 617-277 | Norfolk | Brookline, MA | Verizon New England Inc. |
| 617-278 | Norfolk | Brookline, MA | Verizon New England Inc. |
| 617-279 | Suffolk | Boston, MA | Mci Worldcom Communications |
| 617-280 | Suffolk | Cambridge, MA | Nep |
| 617-281 | Middlesex | Waltham, MA | New Cingular Wireless PCS - DC |
| 617-282 | Suffolk | Dorchester, MA | Verizon New England Inc. |
| 617-283 | Suffolk | Boston, MA | New Cingular Wireless PCS - DC |
There are 766 prefixes, In the code area, the major cities are Belmont, MA;Boston, MA;Brookline, MA;Cambridge, MA. The major city is Boston.