Area Code 978-341 located in CARLISLE, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 978 NXX (Local Number Prefix) : 341 City : CARLISLE County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1999-05-10 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : CONCORD ZIP Code Count : 1 ZIP Code Frequency : 25 ZIP Code : 01741 Other Information NPANXX : 978341 Switch CLLI (Common Language Location Identifier) : CNCRMAWADS0 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 : CONCORD Latitude : 42.4574 Longitude : -71.3463 ‹ previous : 978-340 next › : 978-341 Telephone Number List 978-341-0000 ~ 978-341-9999