Area Code 603-366 located in GILFORD, BELKNAP, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 366 City : GILFORD 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 : LACONIA ZIP Code Count : 143 ZIP Code Frequency : 8 ZIP Code : 03249 Other Information NPANXX : 603366 County Population : 0 Switch CLLI (Common Language Location Identifier) : WERSNHSTRS1 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 : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : LACONIA Latitude : 43.6000 Longitude : -71.4565 ‹ previous : 603-365 next › : 603-366 Telephone Number List 603-366-0000 ~ 603-366-9999