Area Code 339-814 located in CAMBRIDGE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 339 NXX (Local Number Prefix) : 814 City : CAMBRIDGE County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2006-02-16 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : WALTHAM ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 02141 Other Information NPANXX : 339814 County Population : 0 Switch CLLI (Common Language Location Identifier) : CMBRMABE02T 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 Overlay : L Coverage Area Name : CAMBRIDGE Latitude : 42.3648 Longitude : -71.0819 ‹ previous : 339-814 next › : 339-832 Telephone Number List 339-814-0000 ~ 339-814-9999