- Source: Area codes 978 and 351
Area codes 978 and 351 are telephone area codes in the North American Numbering Plan for north central and most of northeastern Massachusetts.
Area code 978 was created in an area code split of area code 508 on September 1, 1997. A permissive dialing period ended on February 1, 1998. Area code 351 was added to the same service area in an overlay complex on May 2, 2001. Since then, ten-digit dialing dialing has been mandatory for all telephone calls.
Prior to when this area was served by 508 (July 1988), it was served only by area code 617, along with the rest of the eastern two-thirds of the state.
Some mobile phone numbers from the 1990s assigned to rate centers in 978 and 351 kept the 508 area code just on those mobile lines after it was split.
The numbering plan area is part of local access and transport area (LATA) 128.
Service area
The service area extends in north central and northeastern Massachusetts, and comprises the following towns and cities.
See also
List of Massachusetts area codes
List of North American Numbering Plan area codes
References
External links
NANPA area code map of Massachusetts
List of exchanges from Area-Codes.com, 978 Area Code
List of exchanges from Area-Codes.com, 351 Area Code
Massachusetts Area Code Map, Mass. Department of Telecommunications and Cable
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- Area codes 978 and 351
- Area code 413
- List of Massachusetts area codes
- List of country calling codes
- Area codes 508 and 774
- Area codes 617 and 857
- List of North American Numbering Plan area codes
- Area codes 208 and 986
- Area code 401
- Area codes 905, 289, 365, and 742
