Area Code 304-260 located in MARTINSBURG, BERKELEY, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 260 City : MARTINSBURG County : BERKELEY State : WV (West Virginia) NXX Use Type : Landline NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 54003 LATA (Local Access Transport Area) : 240 Rate Center : MARTINSBG ZIP Code Count : 783 ZIP Code Frequency : 97 ZIP Code : 25401 Other Information NPANXX : 304260 County Population : 0 Switch CLLI (Common Language Location Identifier) : MRBGWVBUDS0 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 : MARTINSBURG Latitude : 39.4565 Longitude : -77.9647 ‹ previous : 304-260 next › : 304-261 Telephone Number List 304-260-0000 ~ 304-260-9999