Area Code 617-231 located in SAUGUS, ESSEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 231 City : SAUGUS County : ESSEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 25009 LATA (Local Access Transport Area) : 128 Rate Center : WATERTOWN ZIP Code Count : 2 ZIP Code Frequency : 100 ZIP Code : 01906 Other Information NPANXX : 617231 Switch CLLI (Common Language Location Identifier) : BSTNMACODS6 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 CROSSING LOCAL SERVICES, INC.-MA OCN (Operating Company Number) : 8345 Coverage Area Name : BOSTON Latitude : 42.3568 Longitude : -71.0588 ‹ previous : 617-230 next › : 617-232 Telephone Number List 617-231-0000 ~ 617-231-9999