Area Code 617-484 located in BELMONT, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 484 City : BELMONT 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 : BELMONT ZIP Code Count : 5474 ZIP Code Frequency : 95 ZIP Code : 02478 Other Information NPANXX : 617484 Switch CLLI (Common Language Location Identifier) : BLMTMALEDS0 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 : BELMONT Latitude : 42.3964 Longitude : -71.1744 ‹ previous : 617-484 next › : 617-485 Telephone Number List 617-484-0000 ~ 617-484-9999