Area Code 603-453 located in NASHUA, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 453 City : NASHUA County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 33011 Rate Center : LITTLETON ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 03063 Other Information NPANXX : 603453 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHN1FF2 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 Latitude : None Longitude : None ‹ previous : 603-453 next › : 603-454 Telephone Number List 603-453-0000 ~ 603-453-9999