Area Code 603-675 located in CORNISH, SULLIVAN, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 675 City : CORNISH County : SULLIVAN State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 33019 LATA (Local Access Transport Area) : 122 Rate Center : PLAINFIELD ZIP Code Count : 432 ZIP Code Frequency : 51 ZIP Code : 03745 Other Information NPANXX : 603675 County Population : 0 Switch CLLI (Common Language Location Identifier) : WNDSVTPI675 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 : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : CORNISH Latitude : 43.4840 Longitude : -72.3892 ‹ previous : 603-675 next › : 603-676 Telephone Number List 603-675-0000 ~ 603-675-9999