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: 774

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-774 A Wild Rose WI   792K CHARTER IP ENABLED SERVICES, LLC 350      
920-774 1 Wild Rose WI   792K CHARTER IP ENABLED SERVICES, LLC 350   2008-04-20   
920-774 4 Wild Rose WI   145J TERRA NOVA TELECOM INC. 350   2025-07-25   
920-774 6 Wild Rose WI STPTWI01HMD  7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 350   2019-09-27   
920-774 7 Wild Rose WI WYWGWIXA5MD  225C ONVOY, LLC - WI 350   2021-08-09   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.