Area Code 603-581 located in GILFORD, BELKNAP, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 581 City : GILFORD County : BELKNAP State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 33001 LATA (Local Access Transport Area) : 122 Rate Center : LACONIA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03249 Other Information NPANXX : 603581 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHFWDS1 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 : CHOICE ONE COMMUNICATIONS OF NEW HAMPSHIRE, INC. OCN (Operating Company Number) : 2527 Coverage Area Name : LACONIA Latitude : 43.5342 Longitude : -71.4743 ‹ previous : 603-580 next › : 603-582 Telephone Number List 603-581-0000 ~ 603-581-9999