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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Switch: CNCNOHWSXYY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
513-667 A Cincinnati OH 551G NUSO, LLC 922      
513-667 1 Cincinnati OH 551G NUSO, LLC 922   2013-01-25   
513-817 A Cincinnati OH 924G NUSO, LLC 922      
513-817 2 Cincinnati OH 924G NUSO, LLC 922   2014-05-23   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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