Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Portland, MI

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-994 1 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2013-01-30   
517-994 2 MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-994 3 MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-994 4 MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-994 5 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2012-05-28   
517-994 6 LNNGMIMN15Z  961J WOW! INTERNET, CABLE AND PHONE 346   2012-05-20   
517-994 7 MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-994 8 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2009-09-26   
517-994 9 MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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