| 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 |
|---|---|---|---|
| 617-201 | Middlesex | Cambridge, MA | Sprint Spectrum L.p. |
| 617-202 | Suffolk | Brighton, MA | Conversent Communications Of Massachusetts |
| 617-203 | Middlesex | Everett, MA | Allegiance Telecom |
| 617-204 | Suffolk | Boston, MA | Verizon New England Inc. |
| 617-205 | Suffolk | Boston, MA | Norfolk County Internet |
| 617-206 | Suffolk | Brighton, MA | Mci Worldcom Communications |
| 617-207 | Suffolk | Winthrop, MA | Comcast Phone Of Massachusetts |
| 617-208 | Suffolk | Brighton, MA | Xo Massachusetts |
| 617-209 | Middlesex | Belmont, MA | Rcn Telecom Services |
| 617-210 | Suffolk | Boston, MA | Verizon New England Inc. |
| 617-212 | Suffolk | Boston, MA | Sprint Spectrum L.p. |
| 617-213 | Middlesex | Newton, MA | Broadwing Communications |
| 617-214 | Suffolk | Hyde Park, MA | Verizon New England Inc. |
| 617-215 | Middlesex | Newtonville, MA | Verizon New England Inc. |
| 617-216 | Middlesex | Woburn, MA | Sprint Spectrum L.p. |
| 617-217 | Suffolk | Boston, MA | Teleport Communications America |
| 617-218 | Middlesex | Cambridge, MA | Teleport Communications America |
| 617-219 | Middlesex | Newton, MA | Verizon New England Inc. |
| 617-221 | Norfolk | Quincy, MA | Ctc Communications Corp. |
| 617-222 | Suffolk | Boston, MA | Verizon New England Inc. |
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.