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: WACOTX36EMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
254-437 A Hillsboro TX 073H TELNYX LLC 556      
254-437 0 Hillsboro TX 073H TELNYX LLC 556   2021-06-17   
254-475 0 Reagan TX 073H TELNYX LLC 556   2022-04-09   

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

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