Area Code 304-584 located in CLARKSBURG, HARRISON, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 584 City : CLARKSBURG County : HARRISON State : WV (West Virginia) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 54033 LATA (Local Access Transport Area) : 256 Rate Center : LUMBERPORT ZIP Code Count : 65 ZIP Code Frequency : 8 ZIP Code : 26301 Other Information NPANXX : 304584 County Population : 0 Switch CLLI (Common Language Location Identifier) : SNTNWVSHRS1 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 : FRONTIER WEST VIRGINIA INC. OCN (Operating Company Number) : 9214 Coverage Area Name : LUMBERPORT Latitude : 39.3943 Longitude : -80.3002 ‹ previous : 304-583 next › : 304-584 Telephone Number List 304-584-0000 ~ 304-584-9999