Area Code 603-837 located in WHITEFIELD, COOS, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 837 City : WHITEFIELD County : COOS State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33007 LATA (Local Access Transport Area) : 122 Rate Center : WHITEFIELD ZIP Code Count : 1509 ZIP Code Frequency : 99 ZIP Code : 03598 Other Information NPANXX : 603837 County Population : 0 Switch CLLI (Common Language Location Identifier) : WHFDNHPLRS1 MSA CBSA (Core Based Statistical Area) : Berlin, NH-VT MSA CBSA Code (Core Based Statistical Area) : 13620 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 : WHITEFIELD Latitude : 44.3717 Longitude : -71.6145 ‹ previous : 603-836 next › : 603-838 Telephone Number List 603-837-0000 ~ 603-837-9999