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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

OCN: 744G WIDE VOICE, LLC - ND

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
701-801 A Bismarck ND BSMRNDBCFMD  638      
701-801 1 Bismarck ND BSMRNDBCFMD  638   2015-03-01   
701-901 A Williston ND BSMRNDBCHMD  638      
701-901 1 Williston ND BSMRNDBCHMD  638   2015-09-17   
701-931 A Fargo ND   636   2025-05-30   
701-931 1 Fargo ND   636   2025-05-30   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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