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.

Switch: MDSNWI11XIY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-292 A Madison WI 478J NUSO, LLC 354      
608-292 1 Madison WI 478J NUSO, LLC 354   2020-10-01   
779-289 A South Beloit IL 478J NUSO, LLC 354      
779-289 1 South Beloit IL 478J NUSO, LLC 354   2020-10-27   
779-289 9 South Beloit IL 478J NUSO, LLC 354   2023-12-03   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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