Area Code 781-207 located in WALTHAM, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 781 NXX (Local Number Prefix) : 207 City : WALTHAM County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : WALTHAM ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 02451 Other Information NPANXX : 781207 Switch CLLI (Common Language Location Identifier) : QNCYMACE00T 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 : GLOBAL NAPS, INC.-MA OCN (Operating Company Number) : 7755 Coverage Area Name : WALTHAM Latitude : 42.3755 Longitude : -71.2377 ‹ previous : 781-207 next › : 781-208 Telephone Number List 781-207-0000 ~ 781-207-9999