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: SNANTXCA40Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-203 A San Antonio TX 9748 AMERICAN MESSAGING SERVICES, LLC 566      
210-205 A San Antonio TX 9748 AMERICAN MESSAGING SERVICES, LLC 566      
210-217 A San Antonio TX 9748 AMERICAN MESSAGING SERVICES, LLC 566      
210-266 A San Antonio TX 9748 AMERICAN MESSAGING SERVICES, LLC 566      
830-577 A New Braunfels TX 9748 AMERICAN MESSAGING SERVICES, LLC 566      

Last updated: Sat, 29 Jun 2019 02:32:58 UTC

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