Area Code 603-689 located in AMHERST, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 689 City : AMHERST County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : NASHUA ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 03031 Other Information NPANXX : 603689 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHFWDS1 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 : CHOICE ONE COMMUNICATIONS OF NEW HAMPSHIRE, INC. OCN (Operating Company Number) : 2527 Coverage Area Name : NASHUA Latitude : 42.7610 Longitude : -71.4634 ‹ previous : 603-688 next › : 603-690 Telephone Number List 603-689-0000 ~ 603-689-9999