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: MNFDOHXAXHY

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
740-326 9 Mount Vernon OH 793K TWC IP ENABLED SERVICES, LLC 923   2013-09-30   
740-480 8 Centerburg OH 793K TWC IP ENABLED SERVICES, LLC 923   2007-02-13   
740-481 3 Danville (Knox) OH 793K TWC IP ENABLED SERVICES, LLC 923   2007-03-27   
740-759 7 Utica-Homer OH 793K TWC IP ENABLED SERVICES, LLC 923   2007-02-13   
740-791 A Martinsburg OH 793K TWC IP ENABLED SERVICES, LLC 923   2025-02-20   
740-791 4 Martinsburg OH 793K TWC IP ENABLED SERVICES, LLC 923   2008-05-08   
740-830 6 Mount Vernon OH 793K TWC IP ENABLED SERVICES, LLC 923   2015-09-28   
740-848 4 Fredericktown OH 793K TWC IP ENABLED SERVICES, LLC 923   2007-02-13   

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

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