Area Code 617-629 located in SOMERVILLE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 629 City : SOMERVILLE County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : SOMERVILLE ZIP Code Count : 556 ZIP Code Frequency : 26 ZIP Code : 02145 Other Information NPANXX : 617629 Switch CLLI (Common Language Location Identifier) : SOVLMACEDS0 MSA CBSA (Core Based Statistical Area) : Boston-Cambridge-Quincy, MA-NH MSA CBSA Code (Core Based Statistical Area) : 14460 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : VERIZON NEW ENGLAND INC. OCN (Operating Company Number) : 9102 Coverage Area Name : SOMERVILLE Latitude : 42.3889 Longitude : -71.1028 ‹ previous : 617-629 next › : 617-629 Telephone Number List 617-629-0000 ~ 617-629-9999