Area Code 603-278 located in BRETTON WOODS, COOS, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 278 City : BRETTON WOODS County : COOS State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33007 LATA (Local Access Transport Area) : 122 Rate Center : BRETTON WD ZIP Code Count : 322 ZIP Code Frequency : 100 ZIP Code : 03575 Other Information NPANXX : 603278 County Population : 0 Switch CLLI (Common Language Location Identifier) : BTWDNHXADS0 MSA CBSA (Core Based Statistical Area) : Berlin, NH-VT MSA CBSA Code (Core Based Statistical Area) : 13620 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BRETTON WOODS TELEPHONE CO. OCN (Operating Company Number) : 0038 Coverage Area Name : JEFFERSON Latitude : 44.2589 Longitude : -71.4393 ‹ previous : 603-277 next › : 603-279 Telephone Number List 603-278-0000 ~ 603-278-9999