List of Massachusetts area codes

Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP),[7] 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.

[8] Western Massachusetts has area code 413.

[8] 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.

[9]

Numbering plan areas and area codes since May 2001
September 1997 [ 1 ] – May 2001 [ 2 ]
July 1988 [ 3 ] – September 1997 [ 4 ] [ 5 ]
October 1947 – July 1988 [ 6 ]