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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OCN: 8958 XO TEXAS, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
210-388 A San Antonio TX SNARTX91DS0  566      
210-388 0 San Antonio TX SNARTX91DS0  566   2005-05-23   
214-614 A Irving TX DLLSTXSQDS2  552      
214-615 A Dallas TX DLLSTXSQDS2  552      
214-615 0 Dallas TX DLLSTXSQDS2  552      
214-615 1 Dallas TX DLLSTXSQDS2  552      
214-615 2 Dallas TX DLLSTXSQDS2  552      
214-615 3 Dallas TX DLLSTXSQDS2  552      
214-615 5 Dallas TX DLLSTXSQDS2  552      
214-615 6 Dallas TX DLLSTXSQDS2  552      
214-615 7 Dallas TX DLLSTXSQDS2  552      
214-615 8 Dallas TX DLLSTXSQDS2  552      
214-615 9 Dallas TX DLLSTXSQDS2  552      
512-697 0 Austin TX AUSTTXGKDS1  558      
512-697 1 Austin TX AUSTTXGKDS1  558      
832-213 A Houston TX HSTOTXRWDS3  560      
832-213 0 Houston TX HSTOTXRWDS3  560      
832-213 1 Houston TX HSTOTXRWDS3  560      
832-213 2 Houston TX HSTOTXRWDS3  560      
832-213 3 Houston TX HSTOTXRWDS3  560      
832-213 4 Houston TX HSTOTXRWDS3  560      
832-213 5 Houston TX HSTOTXRWDS3  560      

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

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