Area Code 304-312 located in BENWOOD, MARSHALL, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 312 City : BENWOOD County : MARSHALL State : WV (West Virginia) NXX Use Type : Wireless NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 54051 LATA (Local Access Transport Area) : 256 Rate Center : WHELNGZON1 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 26031 Other Information NPANXX : 304312 County Population : 0 Switch CLLI (Common Language Location Identifier) : WLSMWV01XLX MSA CBSA (Core Based Statistical Area) : Wheeling, WV-OH MSA CBSA Code (Core Based Statistical Area) : 48540 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC - IL OCN (Operating Company Number) : 6534 Coverage Area Name : WHEELING Latitude : 40.0590 Longitude : -80.7222 ‹ previous : 304-312 next › : 304-313 Telephone Number List 304-312-0000 ~ 304-312-9999