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: 677

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
608-677 A North Warren WI WRRNILXARS0  1036 FRONTIER NORTH, INC. - IL 360      
608-677 0 North Warren WI   624H ONVOY SPECTRUM, LLC 360   2024-10-31   
608-677 2 North Warren WI   1036 FRONTIER NORTH, INC. - IL 360      
608-677 3 North Warren WI   225C ONVOY, LLC - WI 360   2023-07-22   
608-677 4 North Warren WI   225C ONVOY, LLC - WI 360   2021-07-25   
608-677 6 North Warren WI   225C ONVOY, LLC - WI 360   2020-07-18   
608-677 7 North Warren WI   508J CENTURYLINK COMMUNICATIONS, LLC 360   2016-09-07   
608-677 8 North Warren WI   225C ONVOY, LLC - WI 360   2021-04-11   
608-677 9 North Warren WI   792K CHARTER IP ENABLED SERVICES, LLC 360   2024-06-30   

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

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