Area Code 603-266 located in CONCORD, MERRIMACK, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 266 City : CONCORD County : MERRIMACK State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1999-05-10 FIPS (Federal Information Processing Standards) : 33013 LATA (Local Access Transport Area) : 122 Rate Center : TILTON ZIP Code Count : 1 ZIP Code Frequency : 12 ZIP Code : 03301 Other Information NPANXX : 603266 County Population : 0 Switch CLLI (Common Language Location Identifier) : TLTNNHPRRS1 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 : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : TILTON Latitude : 43.4446 Longitude : -71.5920 ‹ previous : 603-265 next › : 603-266 Telephone Number List 603-266-0000 ~ 603-266-9999