Area Code 617-278 located in BROOKLINE, NORFOLK, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 278 City : BROOKLINE County : NORFOLK State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 25021 LATA (Local Access Transport Area) : 128 Rate Center : BROOKLINE ZIP Code Count : 335 ZIP Code Frequency : 39 ZIP Code : 02446 Other Information NPANXX : 617278 Switch CLLI (Common Language Location Identifier) : BKLIMAMADS1 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 : BROOKLINE Latitude : 42.3388 Longitude : -71.1268 ‹ previous : 617-278 next › : 617-279 Telephone Number List 617-278-0000 ~ 617-278-9999