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: DLLSPAXDHMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
570-432 A Montrose PA 793K TWC IP ENABLED SERVICES, LLC 232      
570-625 A Tioga PA 793K TWC IP ENABLED SERVICES, LLC 232      
570-632 A St Joseph PA 793K TWC IP ENABLED SERVICES, LLC 232      
570-860 A Hallstead PA 793K TWC IP ENABLED SERVICES, LLC 232      
570-944 A Lawrenceville PA 793K TWC IP ENABLED SERVICES, LLC 232      

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

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