Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Detroit Zone 5, MI

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
313-992 4 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2017-07-13   
313-992 5 DTRTMIDJCMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2017-07-16   
313-992 6 DTRTMIDJCMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2017-07-16   
313-992 7 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2016-03-11   
313-992 8 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2016-03-11   
313-992 9 SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2018-04-03   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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