Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP),[1] organized as four overlay complexes and a single-area code NPA.
Eastern Massachusetts has area codes 339, 351, 508, 617, 774, 781, 857, and 978.[2] Western Massachusetts has area code 413.
The numbering plan areas are organized into two local access and transport areas (LATAs): 126 comprises the western part, and 128 covers the central and eastern parts.[3]
| Area code | Region | |
|---|---|---|
| 339/781 | Canton, Hanson, Lincoln, Nahant, Plympton, Revere, Stoughton, Winchester and east-central Massachusetts | |
| 351/978 | Ashby, Barre, Boxborough, Carlisle, Groveland, Rowley, Wendell, Wenham and northeastern Massachusetts | |
| 413 | Becket, Cummington, Hancock, Monson, Montague, Savoy, Sheffield, Warren and western Massachusetts | |
| 508/774 | Berkley, Dennis, Douglas, Easton, Edgartown, Oakham, Oxford, Upton and southeastern Massachusetts | |
| 617/857 | Belmont, Brookline, Chelsea, Everett, Milton, Quincy, Watertown, Winthrop and close-in Boston suburbs |