Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CHCGILIDXDX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
872-877 A Chicago Zone 04-Humboldt IL 624H ONVOY SPECTRUM, LLC 358      
872-877 5 Chicago Zone 04-Humboldt IL 624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 6 Chicago Zone 04-Humboldt IL 624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 7 Chicago Zone 04-Humboldt IL 624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 8 Chicago Zone 04-Humboldt IL 624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-877 9 Chicago Zone 04-Humboldt IL 624H ONVOY SPECTRUM, LLC 358   2021-04-07   
872-895 1 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-02-23   
872-895 2 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-02-23   
872-895 3 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-02-23   
872-895 4 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-02-23   
872-895 6 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-02-23   
872-910 1 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-07-03   
872-910 2 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-07-03   
872-910 5 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-07-03   
872-910 6 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-07-03   
872-910 7 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-05-23   
872-910 8 Chicago Zone 01-Calumet IL 624H ONVOY SPECTRUM, LLC 358   2021-05-23   

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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