Area Code 603-346 located in ALTON BAY, BELKNAP, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 346 City : ALTON BAY County : BELKNAP State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1998-05-18 FIPS (Federal Information Processing Standards) : 33001 LATA (Local Access Transport Area) : 122 Rate Center : PLYMOUTH ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 03810 Other Information NPANXX : 603346 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHNIDS0 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 : LEVEL 3 COMMUNICATIONS - NH OCN (Operating Company Number) : 4017 Coverage Area Name : PLYMOUTH Latitude : 43.7596 Longitude : -71.6910 ‹ previous : 603-345 next › : 603-347 Telephone Number List 603-346-0000 ~ 603-346-9999