Area Code 617-291 located in MATTAPAN, SUFFOLK, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 291 City : MATTAPAN County : SUFFOLK State : MA (Massachusetts) NXX Use Type : Wireless NXX Intro Version : 1995-02-11 FIPS (Federal Information Processing Standards) : 25025 LATA (Local Access Transport Area) : 128 Rate Center : MILTON ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 02126 Other Information NPANXX : 617291 Switch CLLI (Common Language Location Identifier) : WLHMMASEDS0 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 : NEW CINGULAR WIRELESS PCS, LLC - DC OCN (Operating Company Number) : 4036 Coverage Area Name : MILTON Latitude : 42.2691 Longitude : -71.0688 ‹ previous : 617-290 next › : 617-291 Telephone Number List 617-291-0000 ~ 617-291-9999