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: STCDMNTOXNX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
320-727 A Ortonville MN 624H ONVOY SPECTRUM, LLC 626      
320-843 8 Benson MN 624H ONVOY SPECTRUM, LLC 626   2021-07-16   
320-850 A Foley MN 624H ONVOY SPECTRUM, LLC 626   2024-04-14   
320-850 8 Foley MN 624H ONVOY SPECTRUM, LLC 626   2024-04-14   
320-875 0 Murdock MN 624H ONVOY SPECTRUM, LLC 626   2025-02-08   
320-899 1 Pennock MN 624H ONVOY SPECTRUM, LLC 626   2024-12-19   
320-977 1 Holdingford MN 624H ONVOY SPECTRUM, LLC 626   2024-03-10   
320-993 1 Brooten MN 624H ONVOY SPECTRUM, LLC 626   2024-12-19   
605-674 9 Big Stone City SD 624H ONVOY SPECTRUM, LLC 626   2021-07-18   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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