Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 304 [Rate centres in NPA 304] [Dial plan for NPA 304]

NXX: 576

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
304-576 A Apple Grove WV APGVWVAPRS1  9214 FRONTIER WEST VIRGINIA INC. 254      
304-576 0 Apple Grove WV   545B CITYNET WEST VIRGINIA, LLC - WV 254   2004-07-30   
304-576 2 Apple Grove WV   9214 FRONTIER WEST VIRGINIA INC. 254      
304-576 3 Apple Grove WV   9214 FRONTIER WEST VIRGINIA INC. 254      
304-576 4 Apple Grove WV   9214 FRONTIER WEST VIRGINIA INC. 254      
304-576 5 Apple Grove WV   449F ONVOY, LLC - WV 254   2018-11-05   
304-576 6 Apple Grove WV   449F ONVOY, LLC - WV 254   2020-12-06   
304-576 7 Apple Grove WV   508J CENTURYLINK COMMUNICATIONS, LLC 254   2015-10-01   
304-576 8 Apple Grove WV   449F ONVOY, LLC - WV 254   2020-12-06   
304-576 9 Apple Grove WV   073H TELNYX LLC 254   2021-03-04   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.