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: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-575 A Bluff City TN BRSTTN27DS0  895D BRISTOL TENNESSEE ESSENTIAL SERVICES - TN 956      

Last updated: Sun, 06 Oct 2024 02:51:32 UTC

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