Local Calling Guide

Area code/prefix search

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Shaftsburg, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-274 A LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-274 2   624H ONVOY SPECTRUM, LLC 346   2021-08-27   
517-274 4   543C ONVOY, LLCV - MI 346   2021-08-26   
517-274 5   543C ONVOY, LLCV - MI 346   2022-01-13   
517-274 6   543C ONVOY, LLCV - MI 346   2022-01-13   
517-274 7   624H ONVOY SPECTRUM, LLC 346   2022-01-13   
517-274 8   624H ONVOY SPECTRUM, LLC 346   2022-01-13   
517-675 A SHBGMIXIRP0  0726 SHIAWASSEE TEL. CO. 346      
517-675 0   0726 SHIAWASSEE TEL. CO. 346      
517-675 1   0726 SHIAWASSEE TEL. CO. 346      
517-675 2   0726 SHIAWASSEE TEL. CO. 346      
517-675 3   0726 SHIAWASSEE TEL. CO. 346      
517-675 4   0726 SHIAWASSEE TEL. CO. 346      
517-675 5   0726 SHIAWASSEE TEL. CO. 346      
517-675 6   0726 SHIAWASSEE TEL. CO. 346      
517-675 7   0726 SHIAWASSEE TEL. CO. 346      
517-675 8   543C ONVOY, LLCV - MI 346   2020-06-13   
517-675 9   543C ONVOY, LLCV - MI 346   2020-11-27   
517-691 A MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

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

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