Area Code 603-210 located in SUNCOOK, MERRIMACK, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 210 City : SUNCOOK County : MERRIMACK State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 2000-06-13 FIPS (Federal Information Processing Standards) : 33013 LATA (Local Access Transport Area) : 122 Rate Center : SUNCOOK ZIP Code Count : 62 ZIP Code Frequency : 37 ZIP Code : 03275 Other Information NPANXX : 603210 County Population : 0 Switch CLLI (Common Language Location Identifier) : LWLLMADBDS0 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 : COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH OCN (Operating Company Number) : 4112 Coverage Area Name : MANCHESTER Latitude : 42.9783 Longitude : -71.4051 ‹ previous : 603-209 next › : 603-210 Telephone Number List 603-210-0000 ~ 603-210-9999