| District of Massachusetts area codes: 781 | |
|---|---|
| Country | United States |
| State/Province | Massachusetts |
| Major City | Boston |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 781-389 | Middlesex | Winchester, MA | Sprint Spectrum L.p. |
| 781-390 | Norfolk | Randolph, MA | Broadwing Communications |
| 781-391 | Middlesex | Medford, MA | Verizon New England Inc. |
| 781-392 | Middlesex | Waltham, MA | Verizon New England Inc. |
| 781-393 | Middlesex | Medford, MA | Verizon New England Inc. |
| 781-394 | Norfolk | Braintree, MA | Xo Massachusetts |
| 781-395 | Middlesex | Medford, MA | Verizon New England Inc. |
| 781-396 | Middlesex | Medford, MA | Verizon New England Inc. |
| 781-397 | Middlesex | Malden, MA | Verizon New England Inc. |
| 781-398 | Middlesex | Waltham, MA | Verizon New England Inc. |
| 781-399 | Middlesex | Malden, MA | Level 3 Communications |
| 781-400 | Norfolk | Needham, MA | Comcast Phone Of Massachusetts |
| 781-401 | Norfolk | Canton, MA | Verizon New England Inc. |
| 781-402 | Middlesex | Lexington, MA | Verizon New England Inc. |
| 781-404 | Middlesex | Woburn, MA | Ctc Communications Corp. |
| 781-405 | Middlesex | Woburn, MA | Sprint Spectrum L.p. |
| 781-406 | Middlesex | Cambridge, MA | Teleport Communications America |
| 781-407 | Norfolk | Dedham, MA | Verizon New England Inc. |
| 781-408 | Norfolk | Stoughton, MA | Sprint Spectrum L.p. |
| 781-409 | Middlesex | Waltham, MA | Verizon New England Inc. |
There are 727 prefixes, In the code area, the major cities are Arlington, MA;Braintree, MA;Burlington, MA;Dedham,. The major city is Boston.