Area Code 781-673 located in READING, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 781 NXX (Local Number Prefix) : 673 City : READING County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Wireless NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : READING ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 01867 Other Information NPANXX : 781673 Switch CLLI (Common Language Location Identifier) : RDNGMALIDS0 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 : READING Latitude : 42.5206 Longitude : -71.1076 ‹ previous : 781-672 next › : 781-674 Telephone Number List 781-673-0000 ~ 781-673-9999