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: 907

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-907 A Clarklake MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-907 4 Clarklake MI   3535 ACD TELECOM, INC. - MI 346      
517-907 5 Clarklake MI   543C ONVOY, LLCV - MI 346   2021-03-05   
517-907 6 Clarklake MI   543C ONVOY, LLCV - MI 346   2021-03-05   
517-907 7 Clarklake MI   3535 ACD TELECOM, INC. - MI 346      
517-907 8 Clarklake MI   624H ONVOY SPECTRUM, LLC 346   2021-06-17   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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