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: GRBRVAXAX6X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
757-571 A Franklin VA 793K TWC IP ENABLED SERVICES, LLC 252   2025-03-26   
757-571 0 Franklin VA 793K TWC IP ENABLED SERVICES, LLC 252   2018-09-22   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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