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: 824

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-824 A Erwin TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956      
423-824 0 Erwin TN JHCYTNXCXIY  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 956   2024-10-14   
423-824 2 Erwin TN JHCYTNXCXPX  525E ONVOY, LLC - TN 956   2023-10-14   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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