Area Code 304-240 located in MARTINSBURG, BERKELEY, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 240 City : MARTINSBURG County : BERKELEY State : WV (West Virginia) NXX Use Type : Wireless NXX Intro Version : 6/12/2008 FIPS (Federal Information Processing Standards) : 54003 LATA (Local Access Transport Area) : 240 Rate Center : MT MORRIS ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 25404 Other Information NPANXX : 304240 County Population : 0 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 : SPRINT SPECTRUM L.P.- WV OCN (Operating Company Number) : 8575 Coverage Area Name : FALLING WATERS Latitude : 39.5603 Longitude : -77.9306 ‹ previous : 304-239 next › : 304-241 Telephone Number List 304-240-0000 ~ 304-240-9999