Area Code 304-300 located in CLARKSBURG, HARRISON, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 300 City : CLARKSBURG County : HARRISON State : WV (West Virginia) NXX Use Type : Landline NXX Intro Version : 8/6/2008 FIPS (Federal Information Processing Standards) : 54033 LATA (Local Access Transport Area) : 256 Rate Center : CLARKSBURG ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 26301 Other Information NPANXX : 304300 County Population : 0 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 : YMAX COMMUNICATIONS CORP. - WV OCN (Operating Company Number) : 368E Coverage Area Name : CLARKSBURG Latitude : 39.2740 Longitude : -80.3434 ‹ previous : 304-299 next › : 304-301 Telephone Number List 304-300-0000 ~ 304-300-9999