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: AUSTTXGR45Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-889 A Austin TX 624H ONVOY SPECTRUM, LLC 558      
737-304 A Austin TX 624H ONVOY SPECTRUM, LLC 558      
737-357 A Lockhart TX 624H ONVOY SPECTRUM, LLC 558      
737-375 A Rockdale TX 624H ONVOY SPECTRUM, LLC 558      
737-710 A Austin TX 624H ONVOY SPECTRUM, LLC 558      
737-775 A Georgetown TX 624H ONVOY SPECTRUM, LLC 558   2024-03-11   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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