Area Code 617-223 located in WINCHESTER, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 223 City : WINCHESTER County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : BOSTON ZIP Code Count : 1 ZIP Code Frequency : 2 ZIP Code : 01890 Other Information NPANXX : 617223 Switch CLLI (Common Language Location Identifier) : BSTNMABODS2 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 : BOSTON Latitude : 42.3597 Longitude : -71.0636 ‹ previous : 617-223 next › : 617-223 Telephone Number List 617-223-0000 ~ 617-223-9999