Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Jefferson, WI

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
920-747 5   6529 T-MOBILE USA, INC. 356   2017-06-09   
920-747 6   7322 LEVEL 3 TELECOM OF WISCONSIN, LP - WI 356   2013-06-20   
920-747 9   6529 T-MOBILE USA, INC. 356      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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