Area Code 603-329 located in DERRY, ROCKINGHAM, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 329 City : DERRY County : ROCKINGHAM State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33015 LATA (Local Access Transport Area) : 122 Rate Center : HAMPSTEAD ZIP Code Count : 47 ZIP Code Frequency : 2 ZIP Code : 03038 Other Information NPANXX : 603329 County Population : 0 Switch CLLI (Common Language Location Identifier) : HMPSNHMARS1 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 : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : HAMPSTEAD Latitude : 42.8787 Longitude : -71.1865 ‹ previous : 603-329 next › : 603-329 Telephone Number List 603-329-0000 ~ 603-329-9999