Area Code 603-392 located in WINCHESTER, CHESHIRE, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 392 City : WINCHESTER County : CHESHIRE State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 11/7/2006 FIPS (Federal Information Processing Standards) : 33005 LATA (Local Access Transport Area) : 122 Rate Center : WINCHESTER ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03470 Other Information NPANXX : 603392 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHIE3MD MSA CBSA (Core Based Statistical Area) : Keene, NH MSA CBSA Code (Core Based Statistical Area) : 28300 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH OCN (Operating Company Number) : 4112 Coverage Area Name : WINCHESTER Latitude : 42.7732 Longitude : -72.3854 ‹ previous : 603-391 next › : 603-393 Telephone Number List 603-392-0000 ~ 603-392-9999