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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Dickson, TN

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
629-758 7 NSVLTNMT83Z  525E ONVOY, LLC - TN 470   2021-03-15   
629-758 8 NSVLTNMT83Z  525E ONVOY, LLC - TN 470   2021-03-15   
629-758 9 NSVNTNGN1MD  939H COMMIO, LLC 470   2021-06-11   

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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