Area Code 603-520 located in WOLFEBORO, CARROLL, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 520 City : WOLFEBORO County : CARROLL State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 1996-07-01 FIPS (Federal Information Processing Standards) : 33003 LATA (Local Access Transport Area) : 122 Rate Center : LACONIA ZIP Code Count : 2 ZIP Code Frequency : 67 ZIP Code : 03894 Other Information NPANXX : 603520 County Population : 0 Switch CLLI (Common Language Location Identifier) : HKSTNHECCM0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BELL ATLANTIC NYNEX MOBILE OCN (Operating Company Number) : 6386 Coverage Area Name : LACONIA Latitude : 43.5342 Longitude : -71.4743 ‹ previous : 603-520 next › : 603-521 Telephone Number List 603-520-0000 ~ 603-520-9999