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: 972

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-972 A Bell Oak MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-972 2 Bell Oak MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-972 3 Bell Oak MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-972 4 Bell Oak MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-972 5 Bell Oak MI LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346   2021-06-17   
517-972 7 Bell Oak MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-972 9 Bell Oak MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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