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: 953

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-953 A Valders WI   793K TWC IP ENABLED SERVICES, LLC 356      
920-953 3 Valders WI MILWWIAUDS1  225C ONVOY, LLC - WI 356   2021-04-12   
920-953 4 Valders WI   793K TWC IP ENABLED SERVICES, LLC 356   2007-06-20   
920-953 5 Valders WI MILWWIAUDS1  225C ONVOY, LLC - WI 356   2020-01-06   
920-953 6 Valders WI MILWWI45XIX  318J COMCAST IP PHONE, LLC 356   2022-09-16   
920-953 7 Valders WI MILWWI45XBX  508J CENTURYLINK COMMUNICATIONS, LLC 356   2017-10-25   
920-953 8 Valders WI MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356   2022-05-03   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.