Area Code 617-628 located in SOMERVILLE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 628 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 : 1270 ZIP Code Frequency : 27 ZIP Code : 02145 Other Information NPANXX : 617628 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 : 617-628 next › : 617-628 Telephone Number List 617-628-0000 ~ 617-628-9999