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: GNBYWI01XHX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
274-200 A Winneconne WI 624H ONVOY SPECTRUM, LLC 350   2024-12-14   
715-433 A Wisconsin Rapids WI 624H ONVOY SPECTRUM, LLC 350   2024-04-28   
920-510 A Green Bay WI 624H ONVOY SPECTRUM, LLC 350      
920-790 A New Franken WI 624H ONVOY SPECTRUM, LLC 350      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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