Area Code 603-510 located in MERIDEN, SULLIVAN, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 510 City : MERIDEN County : SULLIVAN State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 3/29/2010 FIPS (Federal Information Processing Standards) : 33019 LATA (Local Access Transport Area) : 122 Rate Center : MERIDEN ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 03770 Other Information NPANXX : 603510 County Population : 0 MSA CBSA (Core Based Statistical Area) : Claremont, NH MSA CBSA Code (Core Based Statistical Area) : 17200 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 : MERIDEN Latitude : 43.5540 Longitude : -72.2469 ‹ previous : 603-509 next › : 603-512 Telephone Number List 603-510-0000 ~ 603-510-9999