Area Code 603-245 located in SUNAPEE, SULLIVAN, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 245 City : SUNAPEE County : SULLIVAN State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1999-05-10 FIPS (Federal Information Processing Standards) : 33019 LATA (Local Access Transport Area) : 122 Rate Center : PORTSMOUTH ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 03782 Other Information NPANXX : 603245 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 : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : PORTSMOUTH Latitude : 43.0735 Longitude : -70.7636 ‹ previous : 603-244 next › : 603-246 Telephone Number List 603-245-0000 ~ 603-245-9999