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: WHCYORXXIMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
541-879 A White City OR 792K CHARTER IP ENABLED SERVICES, LLC 670   2025-03-05   
541-879 0 White City OR 792K CHARTER IP ENABLED SERVICES, LLC 670   2007-07-05   
541-879 1 White City OR 792K CHARTER IP ENABLED SERVICES, LLC 670   2008-07-25   
541-879 3 White City OR 792K CHARTER IP ENABLED SERVICES, LLC 670   2012-07-16   

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

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