Area Code 603-588 located in BENNINGTON, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 588 City : BENNINGTON County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : ANTRIM ZIP Code Count : 615 ZIP Code Frequency : 31 ZIP Code : 03442 Other Information NPANXX : 603588 County Population : 0 Switch CLLI (Common Language Location Identifier) : ANTRNHXADS0 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 : MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY OCN (Operating Company Number) : 3320 Coverage Area Name : ANTRIM Latitude : 43.0304 Longitude : -71.9346 ‹ previous : 603-587 next › : 603-588 Telephone Number List 603-588-0000 ~ 603-588-9999