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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OCN: 380H CAS COMMUNICATIONS, LLC - OH

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
220-999 1 Newport OH   324   2021-08-02   
740-371 7 Marietta OH   324   2018-01-05   
740-780 A Belpre OH BLPROH420MD  324      
740-780 4 Belpre OH   324   2015-05-24   

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

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