Area Code 603-453 located in ALTON, BELKNAP, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 453 City : ALTON County : BELKNAP State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 33001 Rate Center : LITTLETON ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 03809 Other Information NPANXX : 603453 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHN1FF2 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 Latitude : None Longitude : None ‹ previous : 603-452 next › : 603-453 Telephone Number List 603-453-0000 ~ 603-453-9999