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: SHRNTNXADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
731-456 A Sharon TN 4336 CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC 468      

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

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