Area Code 351 History:
Area code 351 was put into service. Area code 351 is an overlay of area code 978.
Counties in Massachusetts within area code 351 include:
Essex County, Franklin County, Middlesex County and Worcester County.
Major cities or places in Massachusetts within area code 351 include:
Area codes 351 and 978 serve northeastern Massachusetts including the larger communities of Beverly, Chelmsford, Danvers, Fitchburg, Gardner, Gloucester, Haverhill, Lawrence, Leominster, Lowell, Methuen, Peabody, Salem and Wilimington, in addition to many smaller communities within the service area.