Area Code 603-846 located in TWIN MOUNTAIN, COOS, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 846 City : TWIN MOUNTAIN 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 : TWIN MT ZIP Code Count : 435 ZIP Code Frequency : 99 ZIP Code : 03595 Other Information NPANXX : 603846 County Population : 0 Switch CLLI (Common Language Location Identifier) : TWMTNHYARS1 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 : BETHLEHEM Latitude : 44.2701 Longitude : -71.5501 ‹ previous : 603-845 next › : 603-847 Telephone Number List 603-846-0000 ~ 603-846-9999