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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Hennepin, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-868 A HNPNOKXARP0  2010 MID-AMERICA TEL., INC. 536      
580-868 0   2010 MID-AMERICA TEL., INC. 536      
580-868 1   624H ONVOY SPECTRUM, LLC 536   2025-01-22   
580-868 2   2010 MID-AMERICA TEL., INC. 536      
580-868 3   2010 MID-AMERICA TEL., INC. 536      
580-868 4   2010 MID-AMERICA TEL., INC. 536      
580-868 6   409F ONVOY, LLC - OK 536   2023-11-25   
580-868 8   145J TERRA NOVA TELECOM INC. 536   2025-07-10   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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