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
313-385 8 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2020-07-07   
313-385 9 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2020-07-07   
313-420 1 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2024-05-31   
313-476 4 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2021-06-13   
313-487 1 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2024-05-31   
313-489 4 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2021-12-01   
313-489 5 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-15   
313-489 6 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2021-12-01   
313-489 7 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2021-12-01   
313-489 8 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2021-12-01   
313-490 4 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2022-06-11   
313-490 5 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2022-06-11   
313-493 5 Detroit Zone 4 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-13   
313-504 0 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
313-504 1 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
313-504 2 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
313-504 3 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
313-504 6 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
313-504 7 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-29   
313-514 3 Detroit Zone 4 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-13   
313-524 4 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2021-05-22   
313-524 5 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2021-05-22   
313-524 6 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2021-05-22   
313-536 5 Detroit Zone 4 MI 624H ONVOY SPECTRUM, LLC 340   2021-06-13   
313-540 1 Detroit Zone 4 MI 624H ONVOY SPECTRUM, LLC 340   2022-05-13   
313-540 6 Detroit Zone 4 MI 624H ONVOY SPECTRUM, LLC 340   2022-07-13   
313-542 7 Detroit Zone 5 MI 624H ONVOY SPECTRUM, LLC 340   2021-06-13   
313-548 4 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2021-06-13   
313-552 0 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2021-02-23   
313-612 0 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-07   
313-612 1 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-07   
313-612 7 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-01-07   
313-639 2 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-10-01   
313-639 3 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-10-01   
313-639 4 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-10-01   
313-639 5 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-10-01   
313-639 6 Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340   2022-10-01   
313-644 6 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2021-06-15   
313-650 0 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-650 1 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-650 2 Detroit Zone 6 MI 624H ONVOY SPECTRUM, LLC 340   2021-11-12   
313-661 4 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-06-11   
313-661 5 Detroit Zone 3 MI 624H ONVOY SPECTRUM, LLC 340   2022-06-11   
313-696 5 Detroit Zone 4 MI 624H ONVOY SPECTRUM, LLC 340   2023-03-02   
313-708 A Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340      
313-708 0 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2023-08-15   
313-708 1 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2023-08-15   
313-708 7 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2023-04-24   
313-708 8 Detroit Zone 2 MI 624H ONVOY SPECTRUM, LLC 340   2023-04-24   
313-710 A Detroit Zone 1 MI 624H ONVOY SPECTRUM, LLC 340      

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Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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