Area Code 603-277 located in HANOVER, GRAFTON, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 277 City : HANOVER County : GRAFTON State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 10/13/2006 FIPS (Federal Information Processing Standards) : 33009 LATA (Local Access Transport Area) : 122 Rate Center : HANOVER ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03755 Other Information NPANXX : 603277 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHIE2MD MSA CBSA (Core Based Statistical Area) : Lebanon, NH-VT MSA CBSA Code (Core Based Statistical Area) : 30100 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH OCN (Operating Company Number) : 4112 Coverage Area Name : HANOVER Latitude : 43.7021 Longitude : -72.2922 ‹ previous : 603-276 next › : 603-278 Telephone Number List 603-277-0000 ~ 603-277-9999