Find any 304- phone number in West Virginia
The 304 area code belongs to West Virginia in the North American Numbering Plan (NANP). The NANP is a system of nine-digit codes that identify all the telephone service areas of the U.S. and its territories. The 304 area code was introduced in 1947 along with the four original codes (212, 315, 916 and 415) created for large NANP areas.
The 304 area code covers the entire state of West Virginia and its nearly forty ZIP codes. This region also includes four rural telephone exchanges and several parts of the surrounding states. It is one of the two original area codes that were assigned to the state before the NANP's split system was adopted in 1995. Despite the expansion of the NANP, the 304 area code has not been divided and its layout has remained the same since its inception. However, due to an area's growing population and increased demand for phone numbers, U.S. local number portability (LNP) has been adopted by telecommunications providers to enable subscribers to keep their existing phone numbers while they move within the same area code.