Area Code 603-397 located in DURHAM, STRAFFORD, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 397 City : DURHAM County : STRAFFORD State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 2000-10-31 FIPS (Federal Information Processing Standards) : 33017 LATA (Local Access Transport Area) : 122 Rate Center : DURHAM ZIP Code Count : 41 ZIP Code Frequency : 98 ZIP Code : 03824 Other Information NPANXX : 603397 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHIEW01 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 : COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH OCN (Operating Company Number) : 4112 Coverage Area Name : DURHAM Latitude : 43.1331 Longitude : -70.9221 ‹ previous : 603-397 next › : 603-398 Telephone Number List 603-397-0000 ~ 603-397-9999