Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 608 [Rate centres in NPA 608] [Dial plan for NPA 608]

NXX: 554

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
608-554 A Janesville WI MDSNWI025MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354      
608-554 0 Janesville WI MDSNWI025MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354   2005-10-23   
608-554 1 Janesville WI MDSNWI025MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354   2006-06-25   
608-554 2 Janesville WI MDSNWI025MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354   2007-07-03   
608-554 3 Janesville WI   792K CHARTER IP ENABLED SERVICES, LLC 354   2014-11-18   
608-554 4 Janesville WI MDSNWI025MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354      
608-554 5 Janesville WI MDSNWI025MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354   2014-07-06   
608-554 6 Janesville WI   225C ONVOY, LLC - WI 354   2008-11-10   
608-554 7 Janesville WI   145J TERRA NOVA TELECOM INC. 354   2025-05-07   
608-554 8 Janesville WI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 354   2025-03-10   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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