Area Code 603-249 located in MONT VERNON, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 249 City : MONT VERNON County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1995-07-04 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : MILFORD ZIP Code Count : 19 ZIP Code Frequency : 5 ZIP Code : 03057 Other Information NPANXX : 603249 County Population : 0 Switch CLLI (Common Language Location Identifier) : MLFRNHSODS0 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 : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : MILFORD Latitude : 42.8246 Longitude : -71.6415 ‹ previous : 603-249 next › : 603-249 Telephone Number List 603-249-0000 ~ 603-249-9999