Area Code 603-709 located in PLAINFIELD, SULLIVAN, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 709 City : PLAINFIELD County : SULLIVAN State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 33019 LATA (Local Access Transport Area) : 122 Rate Center : PLAINFIELD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03781 Other Information NPANXX : 603709 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHNIDS0 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 : LEVEL 3 COMMUNICATIONS - NH OCN (Operating Company Number) : 4017 Coverage Area Name : PLAINFIELD Latitude : 43.5317 Longitude : -72.3606 ‹ previous : 603-708 next › : 603-710 Telephone Number List 603-709-0000 ~ 603-709-9999