Area Code 603-590 located in DURHAM, STRAFFORD, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 590 City : DURHAM County : STRAFFORD State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1999-05-10 FIPS (Federal Information Processing Standards) : 33017 LATA (Local Access Transport Area) : 122 Rate Center : DURHAM ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03824 Other Information NPANXX : 603590 County Population : 0 Switch CLLI (Common Language Location Identifier) : PTMONH07DS0 MSA CBSA (Core Based Statistical Area) : Boston-Cambridge-Quincy, MA-NH MSA CBSA Code (Core Based Statistical Area) : 14460 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : FREEDOM RING COMMUNICATIONS, LLC OCN (Operating Company Number) : 8468 Coverage Area Name : DURHAM Latitude : 43.1331 Longitude : -70.9221 ‹ previous : 603-589 next › : 603-591 Telephone Number List 603-590-0000 ~ 603-590-9999