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: SGTNWI11AMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-608 4 Madison WI 732J NUSO, LLC 354   2024-11-11   
608-608 5 Madison WI 732J NUSO, LLC 354   2024-11-11   
608-730 4 Stoughton WI 732J NUSO, LLC 354   2024-10-14   
608-870 A Stoughton WI 732J NUSO, LLC 354      
608-870 1 Stoughton WI 732J NUSO, LLC 354   2023-04-09   
608-870 9 Stoughton WI 732J NUSO, LLC 354   2024-11-24   
608-904 4 Beloit WI 732J NUSO, LLC 354   2024-09-29   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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