Area Code 603-648 located in SALISBURY, MERRIMACK, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 648 City : SALISBURY 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 : SALISBURY ZIP Code Count : 455 ZIP Code Frequency : 61 ZIP Code : 03268 Other Information NPANXX : 603648 County Population : 0 Switch CLLI (Common Language Location Identifier) : SLBRNHXARS1 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 : KEARSARGE TELEPHONE CO. OCN (Operating Company Number) : 0045 Coverage Area Name : FRANKLIN Latitude : 43.3769 Longitude : -71.7170 ‹ previous : 603-648 next › : 603-649 Telephone Number List 603-648-0000 ~ 603-648-9999