Area Code 617-258 located in CAMBRIDGE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 258 City : CAMBRIDGE 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 : CAMBRIDGE ZIP Code Count : 1 ZIP Code Frequency : 12 ZIP Code : 02138 Other Information NPANXX : 617258 Switch CLLI (Common Language Location Identifier) : CMBRMABEDS1 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 : CAMBRIDGE Latitude : 42.3648 Longitude : -71.0819 ‹ previous : 617-258 next › : 617-258 Telephone Number List 617-258-0000 ~ 617-258-9999