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
331-297 3 Geneva IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-298 8 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2023-12-18   
331-313 A Naperville IL 624H ONVOY SPECTRUM, LLC 358      
331-313 0 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-10-19   
331-313 1 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-10-19   
331-313 2 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-10-19   
331-313 3 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-10-19   
331-313 4 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-10-19   
331-314 5 Geneva IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-325 A Lemont IL 624H ONVOY SPECTRUM, LLC 358   2024-05-24   
331-325 0 Lemont IL 624H ONVOY SPECTRUM, LLC 358   2024-05-24   
331-338 A Aurora IL 624H ONVOY SPECTRUM, LLC 358   2025-03-22   
331-338 0 Aurora IL 624H ONVOY SPECTRUM, LLC 358   2025-03-22   
331-338 1 Aurora IL 624H ONVOY SPECTRUM, LLC 358   2025-03-22   
331-338 2 Aurora IL 624H ONVOY SPECTRUM, LLC 358   2025-03-22   
331-341 5 Plano IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-348 2 Elburn IL 624H ONVOY SPECTRUM, LLC 358   2021-11-26   
331-348 5 Elburn IL 624H ONVOY SPECTRUM, LLC 358   2021-06-28   
331-399 4 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2021-06-28   
331-399 7 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2021-11-14   
331-399 8 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2021-11-14   
331-500 5 Geneva IL 624H ONVOY SPECTRUM, LLC 358   2021-06-28   
331-600 3 Wheaton IL 624H ONVOY SPECTRUM, LLC 358   2025-05-12   
331-631 A Downers Grove IL 624H ONVOY SPECTRUM, LLC 358      
331-631 6 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2022-09-09   
331-631 7 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2022-09-09   
331-631 8 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2022-09-09   
331-631 9 Downers Grove IL 624H ONVOY SPECTRUM, LLC 358   2022-09-09   
331-688 6 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-04-22   
331-688 7 Naperville IL 624H ONVOY SPECTRUM, LLC 358   2022-04-22   
331-746 0 Kaneville IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-758 9 Aurora IL 624H ONVOY SPECTRUM, LLC 358   2022-04-10   
331-788 6 Geneva IL 624H ONVOY SPECTRUM, LLC 358   2021-11-26   
331-788 9 Geneva IL 624H ONVOY SPECTRUM, LLC 358   2021-11-26   
331-800 6 West Chicago IL 624H ONVOY SPECTRUM, LLC 358   2021-11-26   
331-800 7 West Chicago IL 624H ONVOY SPECTRUM, LLC 358   2021-11-26   
331-850 8 Big Rock IL 624H ONVOY SPECTRUM, LLC 358   2021-06-27   
331-900 6 Elmhurst IL 624H ONVOY SPECTRUM, LLC 358   2021-06-28   
331-946 2 Glen Ellyn IL 624H ONVOY SPECTRUM, LLC 358   2021-06-28   
464-200 8 Lansing IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
464-219 7 Cicero IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
464-220 1 Crete IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
464-223 0 Peotone IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
464-227 3 Oak Lawn IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   
464-228 0 Blue Island IL 624H ONVOY SPECTRUM, LLC 358   2023-11-17   
464-228 1 Blue Island IL 624H ONVOY SPECTRUM, LLC 358   2023-11-17   
464-228 3 Blue Island IL 624H ONVOY SPECTRUM, LLC 358   2023-11-17   
464-228 4 Blue Island IL 624H ONVOY SPECTRUM, LLC 358   2023-11-17   
464-228 5 Blue Island IL 624H ONVOY SPECTRUM, LLC 358   2023-11-17   
464-237 6 Harvey IL 624H ONVOY SPECTRUM, LLC 358   2024-04-19   

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

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