Area Code 603-831 located in GREENFIELD, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 831 City : GREENFIELD County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : GREENFIELD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03047 Other Information NPANXX : 603831 County Population : 0 Switch CLLI (Common Language Location Identifier) : HKSTNHECCM0 MSA CBSA (Core Based Statistical Area) : Manchester-Nashua, NH MSA CBSA Code (Core Based Statistical Area) : 31700 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BELL ATLANTIC NYNEX MOBILE OCN (Operating Company Number) : 6386 Coverage Area Name : GREENFIELD Latitude : 42.9517 Longitude : -71.8694 ‹ previous : 603-830 next › : 603-832 Telephone Number List 603-831-0000 ~ 603-831-9999