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: SNANTXCADS7

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-236 A San Antonio TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
210-278 A San Antonio TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
210-507 A San Antonio TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
210-536 A San Antonio TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
210-591 A San Antonio TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
210-974 A San Antonio TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
830-463 A Seguin EMS TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
830-642 A Lacoste EMS TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
830-689 A Medina Lake EMS TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
830-697 A Medina Lake TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
956-625 A Laredo TX 7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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