Area Code 603-526 located in NEW LONDON, MERRIMACK, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 526 City : NEW LONDON 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 : NEW LONDON ZIP Code Count : 2457 ZIP Code Frequency : 79 ZIP Code : 03257 Other Information NPANXX : 603526 County Population : 0 Switch CLLI (Common Language Location Identifier) : NWLNNHXADS0 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 : NEW LONDON Latitude : 43.4168 Longitude : -71.9878 ‹ previous : 603-526 next › : 603-527 Telephone Number List 603-526-0000 ~ 603-526-9999