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: CHICCA01XDX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-203 7 Elk Creek CA 073H TELNYX LLC 724   2021-03-22   
530-236 2 Challenge CA 073H TELNYX LLC 724   2021-02-27   
530-900 A Corning CA 073H TELNYX LLC 724      
530-900 8 Corning CA 073H TELNYX LLC 724   2017-03-24   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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