Area Code 978-831 located in LOWELL, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 978 NXX (Local Number Prefix) : 831 City : LOWELL County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : CONCORD ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 01851 Other Information NPANXX : 978831 Switch CLLI (Common Language Location Identifier) : FRMNMAUNX0X 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 : CTC COMMUNICATIONS CORP. - MA OCN (Operating Company Number) : 3370 Coverage Area Name : LOWELL Latitude : 42.6406 Longitude : -71.3089 ‹ previous : 978-830 next › : 978-831 Telephone Number List 978-831-0000 ~ 978-831-9999