Area Code 603-746 located in WARNER, MERRIMACK, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 746 City : WARNER County : MERRIMACK State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33013 LATA (Local Access Transport Area) : 122 Rate Center : CONTOOCOOK ZIP Code Count : 193 ZIP Code Frequency : 7 ZIP Code : 03278 Other Information NPANXX : 603746 County Population : 0 Switch CLLI (Common Language Location Identifier) : CNTCNHXADS0 MSA CBSA (Core Based Statistical Area) : Concord, NH MSA CBSA Code (Core Based Statistical Area) : 18180 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : MERRIMACK COUNTY TELEPHONE CO. OCN (Operating Company Number) : 0047 Coverage Area Name : CONTOOCOOK Latitude : 43.2252 Longitude : -71.7174 ‹ previous : 603-746 next › : 603-746 Telephone Number List 603-746-0000 ~ 603-746-9999