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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NPA: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

NXX: 792

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-792 A Oakdale TN KNVNTNEC8MD  490J DISH WIRELESS, LLC 474   2024-04-26   
423-792 0 Oakdale TN KNVNTNEC8MD  490J DISH WIRELESS, LLC 474   2024-04-26   
423-792 3 Oakdale TN KNVLTNMAYHX  318J COMCAST IP PHONE, LLC 474   2024-11-01   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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