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.

Switch: BSMRNDBCX3X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
701-504 4 Dickinson ND 624H ONVOY SPECTRUM, LLC 638   2024-12-20   
701-518 8 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2023-11-28   
701-518 9 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2023-11-28   
701-595 8 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2023-11-28   
701-791 0 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2023-11-28   
701-975 A Bismarck ND 624H ONVOY SPECTRUM, LLC 638      
701-975 0 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2017-08-27   
701-975 1 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2021-10-29   
701-975 2 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2021-10-29   
701-975 7 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2021-10-29   
701-975 8 Bismarck ND 624H ONVOY SPECTRUM, LLC 638   2021-10-29   
701-981 6 Belfield ND 624H ONVOY SPECTRUM, LLC 638   2021-07-18   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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