Area Code 617-204 located in BOSTON, SUFFOLK, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 204 City : BOSTON County : SUFFOLK State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1996-10-15 FIPS (Federal Information Processing Standards) : 25025 LATA (Local Access Transport Area) : 128 Rate Center : BOSTON ZIP Code Count : 2 ZIP Code Frequency : 5 ZIP Code : 02109 Other Information NPANXX : 617204 Switch CLLI (Common Language Location Identifier) : BSTNMAFRDS0 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 : 42.3540 Longitude : -71.0540 ‹ previous : 617-204 next › : 617-204 Telephone Number List 617-204-0000 ~ 617-204-9999