Area Code 304-423 located in CLARKSBURG, HARRISON, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 423 City : CLARKSBURG County : HARRISON State : WV (West Virginia) NXX Use Type : Landline NXX Intro Version : 2004-05-02 FIPS (Federal Information Processing Standards) : 54033 LATA (Local Access Transport Area) : 256 Rate Center : CLARKSBURG ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 26301 Other Information NPANXX : 304423 County Population : 0 Switch CLLI (Common Language Location Identifier) : CLBGWVCP9MD MSA CBSA (Core Based Statistical Area) : Clarksburg, WV MSA CBSA Code (Core Based Statistical Area) : 17220 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : CITYNET WEST VIRGINIA, LLC - WV OCN (Operating Company Number) : 545B Coverage Area Name : CLARKSBURG Latitude : 39.2740 Longitude : -80.3434 ‹ previous : 304-422 next › : 304-424 Telephone Number List 304-423-0000 ~ 304-423-9999