Area Code 978-354 located in CAMBRIDGE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 978 NXX (Local Number Prefix) : 354 City : CAMBRIDGE County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2000-01-14 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : SALEM ZIP Code Count : 5 ZIP Code Frequency : 56 ZIP Code : 02139 Other Information NPANXX : 978354 Switch CLLI (Common Language Location Identifier) : SALMMANODS0 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 : SALEM Latitude : 42.5199 Longitude : -70.8997 ‹ previous : 978-354 next › : 978-355 Telephone Number List 978-354-0000 ~ 978-354-9999