Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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 2 North Warren WI WRRNILXARS0  1036 FRONTIER NORTH, INC. - IL 360      
608-677 3 North Warren WI RCFRILRTZMD  225C ONVOY, LLC - WI 360   2023-07-22   
608-677 4 North Warren WI RCFRILRTZMD  225C ONVOY, LLC - WI 360   2021-07-25   
608-677 6 North Warren WI RCFRILRTZMD  225C ONVOY, LLC - WI 360   2020-07-18   
608-677 7 North Warren WI RCFRILRTXRX  508J CENTURYLINK COMMUNICATIONS, LLC 360   2016-09-07   
608-677 8 North Warren WI RCFRILRTZMD  225C ONVOY, LLC - WI 360   2021-04-11   
608-677 9 North Warren WI   3839 CHARTER FIBERLINK, LLC - WI 360   2024-06-30   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.