Area Code 603-851 located in KEENE, CHESHIRE, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 851 City : KEENE County : CHESHIRE State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 1999-10-13 FIPS (Federal Information Processing Standards) : 33005 LATA (Local Access Transport Area) : 122 Rate Center : MANCHESTER ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 03431 Other Information NPANXX : 603851 County Population : 0 Switch CLLI (Common Language Location Identifier) : WLBNNHAXCM1 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 : BELL ATLANTIC NYNEX MOBILE OCN (Operating Company Number) : 6386 Coverage Area Name : MANCHESTER Latitude : 42.9935 Longitude : -71.4608 ‹ previous : 603-849 next › : 603-852 Telephone Number List 603-851-0000 ~ 603-851-9999