Area Code 304-229 located in INWOOD, BERKELEY, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 229 City : INWOOD County : BERKELEY State : WV (West Virginia) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 54003 LATA (Local Access Transport Area) : 240 Rate Center : INWOOD ZIP Code Count : 2679 ZIP Code Frequency : 44 ZIP Code : 25428 Other Information NPANXX : 304229 County Population : 0 Switch CLLI (Common Language Location Identifier) : INWDWVIDRS1 MSA CBSA (Core Based Statistical Area) : Hagerstown-Martinsburg, MD-WV MSA CBSA Code (Core Based Statistical Area) : 25180 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : FRONTIER WEST VIRGINIA INC. OCN (Operating Company Number) : 9214 Coverage Area Name : INWOOD Latitude : 39.3592 Longitude : -78.0431 ‹ previous : 304-229 next › : 304-230 Telephone Number List 304-229-0000 ~ 304-229-9999