Area Code 603-548 located in NEWTON, ROCKINGHAM, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 548 City : NEWTON County : ROCKINGHAM State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 1996-07-01 FIPS (Federal Information Processing Standards) : 33015 LATA (Local Access Transport Area) : 122 Rate Center : DERRY ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 03858 Other Information NPANXX : 603548 County Population : 0 Switch CLLI (Common Language Location Identifier) : HKSTNHECCM0 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 : BELL ATLANTIC NYNEX MOBILE OCN (Operating Company Number) : 6386 Coverage Area Name : DERRY Latitude : 42.8816 Longitude : -71.3203 ‹ previous : 603-547 next › : 603-549 Telephone Number List 603-548-0000 ~ 603-548-9999