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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Chicago Zone 04-Humboldt, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
872-877 6 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 7 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 8 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 9 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2021-04-07   

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Last updated: Sat, 01 Jun 2024 11:59:14 UTC

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