Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
779-342 7 Dwight IL 939H COMMIO, LLC 358   2024-02-04   
779-342 8 Dwight IL 939H COMMIO, LLC 358   2024-02-04   
779-374 8 Joliet IL 939H COMMIO, LLC 358   2024-02-03   
779-374 9 Joliet IL 939H COMMIO, LLC 358   2024-02-03   
779-376 A Grant Park IL 939H COMMIO, LLC 358      
779-376 0 Grant Park IL 939H COMMIO, LLC 358   2023-10-15   
779-376 1 Grant Park IL 939H COMMIO, LLC 358   2023-10-15   
779-376 2 Grant Park IL 939H COMMIO, LLC 358   2023-10-15   
779-376 3 Grant Park IL 939H COMMIO, LLC 358   2023-10-15   
779-376 4 Grant Park IL 939H COMMIO, LLC 358   2023-10-15   
779-376 8 Grant Park IL 939H COMMIO, LLC 358   2024-02-04   
779-378 1 McHenry IL 939H COMMIO, LLC 358   2024-02-04   
779-381 8 La Salle IL 939H COMMIO, LLC 358   2024-02-04   
779-381 9 La Salle IL 939H COMMIO, LLC 358   2024-02-04   
779-732 8 La Salle IL 939H COMMIO, LLC 358   2021-09-17   
779-732 9 La Salle IL 939H COMMIO, LLC 358   2021-09-17   
779-758 4 Joliet IL 939H COMMIO, LLC 358   2021-09-03   
779-977 1 Harvard IL 939H COMMIO, LLC 358   2024-02-04   
779-977 4 Harvard IL 939H COMMIO, LLC 358   2023-08-25   
779-977 5 Harvard IL 939H COMMIO, LLC 358   2023-08-25   
779-977 6 Harvard IL 939H COMMIO, LLC 358   2023-08-25   
779-977 8 Harvard IL 939H COMMIO, LLC 358   2023-08-25   
779-977 9 Harvard IL 939H COMMIO, LLC 358   2023-08-25   
815-304 0 Kankakee IL 939H COMMIO, LLC 358   2021-10-14   
815-304 1 Kankakee IL 939H COMMIO, LLC 358   2021-10-14   
815-304 7 Kankakee IL 939H COMMIO, LLC 358   2021-10-14   
815-304 8 Kankakee IL 939H COMMIO, LLC 358   2021-10-14   
815-331 4 McHenry IL 939H COMMIO, LLC 358   2021-10-14   
815-331 7 McHenry IL 939H COMMIO, LLC 358   2021-10-14   
815-785 6 Watseka IL 939H COMMIO, LLC 358   2022-02-24   
847-449 A Cary IL 939H COMMIO, LLC 358      
847-449 0 Cary IL 939H COMMIO, LLC 358   2023-10-16   
847-449 1 Cary IL 939H COMMIO, LLC 358   2023-10-16   
847-449 2 Cary IL 939H COMMIO, LLC 358   2023-10-16   
847-449 3 Cary IL 939H COMMIO, LLC 358   2023-10-16   
847-449 4 Cary IL 939H COMMIO, LLC 358   2023-10-16   
847-586 1 Dundee IL 939H COMMIO, LLC 358   2021-10-14   
847-586 8 Dundee IL 939H COMMIO, LLC 358   2021-10-14   
847-752 7 Grayslake IL 939H COMMIO, LLC 358   2021-10-21   
847-900 A Grayslake IL 939H COMMIO, LLC 358   2024-03-10   
847-900 0 Grayslake IL 939H COMMIO, LLC 358   2024-03-10   
847-900 1 Grayslake IL 939H COMMIO, LLC 358   2024-03-10   
872-275 A Chicago Zone 01-Calumet IL 939H COMMIO, LLC 358      
872-275 1 Chicago Zone 01-Calumet IL 939H COMMIO, LLC 358   2021-09-03   
872-275 7 Chicago Zone 01-Calumet IL 939H COMMIO, LLC 358   2021-09-03   
872-275 8 Chicago Zone 01-Calumet IL 939H COMMIO, LLC 358   2021-09-03   
872-275 9 Chicago Zone 01-Calumet IL 939H COMMIO, LLC 358   2021-09-03   
872-280 A Chicago Zone 04-Humboldt IL 939H COMMIO, LLC 358      
872-280 1 Chicago Zone 04-Humboldt IL 939H COMMIO, LLC 358   2021-07-03   
872-280 2 Chicago Zone 04-Humboldt IL 939H COMMIO, LLC 358   2021-07-03   

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

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