Area Code 304-257 located in PETERSBURG, GRANT, WV, more detail is as below. Place NPA (Numbering Plan Area) : 304 NXX (Local Number Prefix) : 257 City : PETERSBURG County : GRANT State : WV (West Virginia) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 54023 LATA (Local Access Transport Area) : 256 Rate Center : PETERSBURG ZIP Code Count : 2569 ZIP Code Frequency : 94 ZIP Code : 26847 Other Information NPANXX : 304257 County Population : 0 Switch CLLI (Common Language Location Identifier) : PTBGWVXADS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : CITIZENS TELECOMMUNICATIONS CO OF WEST VIRGINIA OCN (Operating Company Number) : 0270 Coverage Area Name : PETERSBURG Latitude : 38.9947 Longitude : -79.1265 ‹ previous : 304-257 next › : 304-258 Telephone Number List 304-257-0000 ~ 304-257-9999