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: 923

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-923 A Fitchburg MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-923 2 Fitchburg MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2020-02-10   
517-923 3 Fitchburg MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2020-02-10   
517-923 4 Fitchburg MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-923 6 Fitchburg MI LNNGMIMNXQZ  508J CENTURYLINK COMMUNICATIONS, LLC 346   2016-01-25   
517-923 7 Fitchburg MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

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

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