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: 228

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-228 A Seymour WI GNBYWIEMCM3  6692 NEW CELL DBA CELLCOM 350      
920-228 0 Seymour WI   6692 NEW CELL DBA CELLCOM 350      
920-228 1 Seymour WI   6692 NEW CELL DBA CELLCOM 350      
920-228 2 Seymour WI   6692 NEW CELL DBA CELLCOM 350      
920-228 3 Seymour WI   6274 UNITED STATES CELLULAR - WI 350   2008-08-28   
920-228 4 Seymour WI   007F BANDWIDTH.COM CLEC, LLC - WI 350   2019-01-07   
920-228 5 Seymour WI   624H ONVOY SPECTRUM, LLC 350   2021-06-22   
920-228 6 Seymour WI   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 350   2024-09-06   
920-228 7 Seymour WI   508J CENTURYLINK COMMUNICATIONS, LLC 350   2014-11-24   
920-228 8 Seymour WI   225C ONVOY, LLC - WI 350   2018-10-27   
920-228 9 Seymour WI   007F BANDWIDTH.COM CLEC, LLC - WI 350   2021-12-19   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.