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: 506

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-506 A Greenbush WI PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356      
920-506 0 Greenbush WI   145J TERRA NOVA TELECOM INC. 356   2025-08-24   
920-506 7 Greenbush WI PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356   2021-09-03   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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