Area Code 603-657 located in MANCHESTER, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 657 City : MANCHESTER 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 : MANCHESTER ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03101 Other Information NPANXX : 603657 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 : MANCHESTER Latitude : 42.9736 Longitude : -71.4669 ‹ previous : 603-657 next › : 603-658 Telephone Number List 603-657-0000 ~ 603-657-9999