Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 304 [Rate centres in NPA 304] [Dial plan for NPA 304]

NXX: 681

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
304-681 A Grantsville WV HNTNWVDT0MD  9944 LEVEL 3 COMMUNICATIONS, LLC - WV 254      
304-681 7 Grantsville WV HNTNWVDT0MD  9944 LEVEL 3 COMMUNICATIONS, LLC - WV 254   2023-07-25   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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