Area Code 603-875 located in ALTON, BELKNAP, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 875 City : ALTON County : BELKNAP State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33001 LATA (Local Access Transport Area) : 122 Rate Center : ALTON ZIP Code Count : 1411 ZIP Code Frequency : 61 ZIP Code : 03809 Other Information NPANXX : 603875 County Population : 0 Switch CLLI (Common Language Location Identifier) : ALTNNHXADS0 MSA CBSA (Core Based Statistical Area) : Laconia, NH MSA CBSA Code (Core Based Statistical Area) : 29060 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : UNION TELEPHONE CO. - NH OCN (Operating Company Number) : 0049 Coverage Area Name : ALTON Latitude : 43.4563 Longitude : -71.2207 ‹ previous : 603-875 next › : 603-876 Telephone Number List 603-875-0000 ~ 603-875-9999