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.
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Switch: SXFLSDCOXUX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-403 1 Sioux Falls SD 478J NUSO, LLC 640      
605-799 9 Sioux Falls SD 478J NUSO, LLC 640      
605-809 0 Sioux Falls SD 478J NUSO, LLC 640      
701-503 A North McIntosh ND 478J NUSO, LLC 640      
701-503 1 North McIntosh ND 478J NUSO, LLC 640      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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