Area Code 617-280 located in CAMBRIDGE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 280 City : CAMBRIDGE County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Wireless NXX Intro Version : 2004-01-27 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : CAMBRIDGE ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 02138 Other Information NPANXX : 617280 Switch CLLI (Common Language Location Identifier) : WOBNMADWN23 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 : NEP, LLC OCN (Operating Company Number) : 174A Coverage Area Name : CAMBRIDGE Latitude : 42.3720 Longitude : -71.1137 ‹ previous : 617-279 next › : 617-280 Telephone Number List 617-280-0000 ~ 617-280-9999