Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-510 A Clayton MI ADRNMIXGOMD  543C ONVOY, LLCV - MI 340      
517-510 2 Clayton MI ADRNMIXGOMD  543C ONVOY, LLCV - MI 340   2021-07-19   
517-510 8 Clayton MI ADRNMIXGMMD  624H ONVOY SPECTRUM, LLC 340   2024-10-28   
517-510 9 Clayton MI DTRTMIBAUMD  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-06   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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