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
313-710 7 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2019-11-12   
313-713 2 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2023-03-02   
313-741 0 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2024-07-07   
313-741 1 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2024-07-07   
313-746 2 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-08-08   
313-746 9 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-08-08   
313-756 0 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2021-02-23   
313-756 1 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2021-02-23   
313-761 1 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2024-05-31   
313-764 1 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2024-10-23   
313-764 3 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2024-10-23   
313-764 4 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2024-10-23   
313-787 A Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340      
313-787 2 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2023-04-24   
313-787 3 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2023-04-24   
313-787 4 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2023-04-24   
313-787 5 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2023-06-23   
313-791 1 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-824 1 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-824 8 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-944 3 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-944 9 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
517-553 3 Howell MI 624H ONVOY SPECTRUM, LLC 340   2021-11-25   
517-553 4 Howell MI 624H ONVOY SPECTRUM, LLC 340   2021-11-25   
586-207 4 Washington MI 624H ONVOY SPECTRUM, LLC 340   2021-06-17   
586-278 0 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2022-05-09   
586-278 1 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2022-04-10   
586-278 2 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2021-06-13   
586-278 3 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2022-01-30   
586-278 4 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2022-01-30   
586-278 6 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2021-11-18   
586-280 0 Mount Clemens MI 624H ONVOY SPECTRUM, LLC 340   2021-06-14   
586-301 8 Warren MI 624H ONVOY SPECTRUM, LLC 340   2023-06-23   
586-302 4 Mount Clemens MI 624H ONVOY SPECTRUM, LLC 340   2023-06-23   
586-304 0 New Haven MI 624H ONVOY SPECTRUM, LLC 340   2021-12-02   
586-304 1 New Haven MI 624H ONVOY SPECTRUM, LLC 340   2021-12-02   
586-310 1 Mount Clemens MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
586-310 2 Mount Clemens MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
586-325 0 New Baltimore MI 624H ONVOY SPECTRUM, LLC 340   2021-12-02   
586-325 1 New Baltimore MI 624H ONVOY SPECTRUM, LLC 340   2021-12-02   
586-331 4 Romeo MI 624H ONVOY SPECTRUM, LLC 340   2021-06-15   
586-340 8 Center Line MI 624H ONVOY SPECTRUM, LLC 340   2023-06-23   
586-345 8 Mount Clemens MI 624H ONVOY SPECTRUM, LLC 340   2021-11-13   
586-345 9 Mount Clemens MI 624H ONVOY SPECTRUM, LLC 340   2021-11-13   
586-355 7 Richmond MI 624H ONVOY SPECTRUM, LLC 340   2021-06-15   
586-358 A Utica MI 624H ONVOY SPECTRUM, LLC 340      
586-358 5 Utica MI 624H ONVOY SPECTRUM, LLC 340   2023-06-23   
586-358 8 Utica MI 624H ONVOY SPECTRUM, LLC 340   2023-04-24   
586-362 3 Roseville MI 624H ONVOY SPECTRUM, LLC 340   2023-04-14   
586-366 3 Armada MI 624H ONVOY SPECTRUM, LLC 340   2024-03-23   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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