Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 920 [Rate centres in NPA 920] [Dial plan for NPA 920]

NXX: 670

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-670 A Johnsburg WI FDULWIGN1MD  792K CHARTER IP ENABLED SERVICES, LLC 356      
920-670 0 Johnsburg WI FDULWIGN1MD  792K CHARTER IP ENABLED SERVICES, LLC 356   2006-07-22   
920-670 4 Johnsburg WI PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356   2021-06-25   
920-670 6 Johnsburg WI MILWWIAUDS1  225C ONVOY, LLC - WI 356   2021-04-08   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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