Area Code 603-275 located in DERRY, ROCKINGHAM, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 275 City : DERRY County : ROCKINGHAM State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 33015 LATA (Local Access Transport Area) : 122 Rate Center : DERRY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 03038 Other Information NPANXX : 603275 County Population : 0 Switch CLLI (Common Language Location Identifier) : MNCHNHCOCM1 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 : OMNIPOINT MIAMI E LICENSE, LLC OCN (Operating Company Number) : 6889 Coverage Area Name : DERRY Latitude : 42.8816 Longitude : -71.3203 ‹ previous : 603-274 next › : 603-276 Telephone Number List 603-275-0000 ~ 603-275-9999