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: 236

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
304-236 A Williamson WV WMSNWVLGRS1  9214 FRONTIER WEST VIRGINIA INC. 254      
304-236 1 Williamson WV CHTNWVLEXBZ  449F ONVOY, LLC - WV 254   2020-06-05   
304-236 2 Williamson WV WMSNWVLGRS1  9214 FRONTIER WEST VIRGINIA INC. 254      
304-236 3 Williamson WV   612K CSC VOICE, LLC 254   2014-02-17   
304-236 4 Williamson WV WMSNWVLGRS1  9214 FRONTIER WEST VIRGINIA INC. 254      
304-236 5 Williamson WV   612K CSC VOICE, LLC 254   2007-01-26   
304-236 6 Williamson WV   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 254   2010-01-04   
304-236 7 Williamson WV CHTNWVCE8MD  545B CITYNET WEST VIRGINIA, LLC - WV 254   2004-04-05   
304-236 9 Williamson WV CHTNWVLEXBZ  449F ONVOY, LLC - WV 254   2020-06-05   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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