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← Area code 304

304-623 phone numbers

Numbers 304-623-0000 to 304-623-9999 are assigned to Frontier West Virginia Inc. in Clarksburg, WV. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 304-623