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: PTMOOHXADMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
740-451 A Chesapeake OH 024E ARMSTRONG TELECOMMUNICATIONS, INC. - OH 324      
740-809 9 Johnstown OH 024E ARMSTRONG TELECOMMUNICATIONS, INC. - OH 324   2017-12-15   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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