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: 607

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-607 A Campbellsport WI PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356      
920-607 0 Campbellsport WI PLMOWIXAHMD  225C ONVOY, LLC - WI 356   2023-10-28   
920-607 1 Campbellsport WI PLMOWIXAHMD  225C ONVOY, LLC - WI 356   2023-10-28   
920-607 4 Campbellsport WI MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2022-03-28   
920-607 5 Campbellsport WI PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356   2021-07-30   
920-607 7 Campbellsport WI   623D TIME WARNER CABLE INFORMATION SVCS (WISCONSIN) WI 356   2025-09-14   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.