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: 991

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-991 A Camden MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-991 0 Camden MI   624H ONVOY SPECTRUM, LLC 346   2024-05-03   
517-991 1 Camden MI   543C ONVOY, LLCV - MI 346   2018-10-12   
517-991 2 Camden MI   543C ONVOY, LLCV - MI 346   2021-07-11   
517-991 3 Camden MI   3535 ACD TELECOM, INC. - MI 346      
517-991 4 Camden MI   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346   2016-02-15   
517-991 5 Camden MI   792K CHARTER IP ENABLED SERVICES, LLC 346   2026-02-22   
517-991 7 Camden MI   508J CENTURYLINK COMMUNICATIONS, LLC 346   2016-01-23   
517-991 8 Camden MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 346   2025-09-19   
517-991 9 Camden MI   145J TERRA NOVA TELECOM INC. 346   2025-05-31   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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