Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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St Clair, MI

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
810-740 4 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-05-06   
810-740 5 DTRTMIBASMD  516C AT&T CORP. 340   2011-11-30   
810-740 6 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2012-10-13   
810-740 7 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2013-01-31   
810-740 8 DTRTMIVWDMD  624H ONVOY SPECTRUM, LLC 340   2021-06-15   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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