Area Code 339-201 located in CAMBRIDGE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 339 NXX (Local Number Prefix) : 201 City : CAMBRIDGE County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2/17/2012 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : WEYMOUTH ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 02141 Other Information NPANXX : 339201 County Population : 0 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 Company : LEVEL 3 COMMUNICATIONS, LLC - MA OCN (Operating Company Number) : 4018 Coverage Area Name : CAMBRIDGE Latitude : 42.3648 Longitude : -71.0819 ‹ previous : 339-200 next › : 339-202 Telephone Number List 339-201-0000 ~ 339-201-9999