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.

Switch: BLFDWVXAXGY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
304-251 A Bluefield WV 321J HD CARRIER LLC 932      
304-251 2 Bluefield WV 321J HD CARRIER LLC 932   2026-03-06   
304-251 3 Bluefield WV 321J HD CARRIER LLC 932   2026-03-06   
304-251 4 Bluefield WV 321J HD CARRIER LLC 932   2026-03-06   
304-251 9 Bluefield WV 321J HD CARRIER LLC 932   2026-03-06   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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