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

NXX: 920

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
304-920 A Bluefield WV BLFDWVXAXMD  6284 UNITED STATES CELLULAR - WV 932      
304-920 0 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 1 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 2 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 3 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 4 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 5 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 6 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 7 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 8 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      
304-920 9 Bluefield WV   6284 UNITED STATES CELLULAR - WV 932      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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