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-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
701-901 A Williston ND 744G WIDE VOICE, LLC - ND 638      
701-901 1 Williston ND 744G WIDE VOICE, LLC - ND 638   2015-09-17   

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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