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: SXCYIA78X1X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-540 A North Sioux City SD 5180 LEVEL 3 COMMUNICATIONS, LLC - SD 630      
712-560 A Sioux City IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 630      
712-631 A Sheldon IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 630      
712-823 A Sergeant Bluff IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 630      
712-941 A Sergeant Bluff IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 630      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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