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: 920 [Rate centres in NPA 920] [Dial plan for NPA 920]

NXX: 866

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-866 A New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      
920-866 0 New Franken WI GNBYWIATUMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2017-03-17   
920-866 1 New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      
920-866 2 New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      
920-866 3 New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      
920-866 4 New Franken WI   793K TWC IP ENABLED SERVICES, LLC 350   2013-12-02   
920-866 5 New Franken WI GNBYWIEL1MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 350   2014-11-25   
920-866 6 New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      
920-866 7 New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      
920-866 8 New Franken WI GNBYWIATUMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 350   2016-05-02   
920-866 9 New Franken WI NWFRWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 350      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.