Area Code 603-860 located in WILTON, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 860 City : WILTON County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 1996-07-01 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : MANCHESTER ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 03086 Other Information NPANXX : 603860 County Population : 0 Switch CLLI (Common Language Location Identifier) : HKSTNHECCM0 MSA CBSA (Core Based Statistical Area) : Manchester-Nashua, NH MSA CBSA Code (Core Based Statistical Area) : 31700 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BELL ATLANTIC NYNEX MOBILE OCN (Operating Company Number) : 6386 Coverage Area Name : MANCHESTER Latitude : 42.9935 Longitude : -71.4608 ‹ previous : 603-860 next › : 603-861 Telephone Number List 603-860-0000 ~ 603-860-9999