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: 778

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-778 A Larsen WI   793K TWC IP ENABLED SERVICES, LLC 350      
920-778 0 Larsen WI   793K TWC IP ENABLED SERVICES, LLC 350      
920-778 1 Larsen WI   792K CHARTER IP ENABLED SERVICES, LLC 350   2024-11-24   
920-778 6 Larsen WI   6529 T-MOBILE USA, INC. 350   2025-02-21   
920-778 7 Larsen WI GNBYWI01XHX  624H ONVOY SPECTRUM, LLC 350   2021-06-21   
920-778 8 Larsen WI APPLWI01X9X  007F BANDWIDTH.COM CLEC, LLC - WI 350   2020-03-13   

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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