Area Code 603-255 located in ERROL, COOS, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 255 City : ERROL County : COOS State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33007 LATA (Local Access Transport Area) : 122 Rate Center : DIXVL NTCH ZIP Code Count : 1 ZIP Code Frequency : 3 ZIP Code : 03579 Other Information NPANXX : 603255 County Population : 0 Switch CLLI (Common Language Location Identifier) : DXNTNHXA255 MSA CBSA (Core Based Statistical Area) : Berlin, NH-VT MSA CBSA Code (Core Based Statistical Area) : 13620 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : DIXVILLE TELEPHONE CO. OCN (Operating Company Number) : 0042 Coverage Area Name : COLEBROOK Latitude : 44.8710 Longitude : -71.3074 ‹ previous : 603-254 next › : 603-255 Telephone Number List 603-255-0000 ~ 603-255-9999