Area Code 603-371 located in PETERBOROUGH, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 371 City : PETERBOROUGH County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 2000-01-14 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : PETERBROGH ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03458 Other Information NPANXX : 603371 County Population : 0 Switch CLLI (Common Language Location Identifier) : NASHNH08DS0 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 : CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC OCN (Operating Company Number) : 4053 Coverage Area Name : PETERBOROUGH Latitude : 42.8808 Longitude : -71.9479 ‹ previous : 603-370 next › : 603-372 Telephone Number List 603-371-0000 ~ 603-371-9999