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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OCN: 1651 INTERSTATE TELECOM. COOP., INC. - SOUTH DAKOTA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
507-277 A East Gary MN CLLKSDXADS0  640      
507-548 A East Elkton MN CLLKSDXADS0  640      
605-272 A Gary SD CLLKSDXADS0  640      
605-345 A Webster SD WBSTSDXADS0  640      
605-483 A Wentworth SD BKNGSDXBDS0  640      
605-489 A Chester SD BKNGSDXBDS0  640      
605-532 A Clark SD CLRKSDXADS0  640      
605-542 A Elkton SD CLLKSDXADS0  640      
605-586 A Nunda SD BKNGSDXBDS0  640      
605-625 A Bryant-Willow Lake SD CLRKSDXADS0  640      
605-628 A Bryant-Willow Lake SD CLRKSDXADS0  640      
605-629 A White SD CLLKSDXADS0  640      
605-693 A Brookings Rural SD   640      
605-758 A Florence SD WBSTSDXADS0  640      
605-783 A Hayti SD CLRKSDXADS0  640      
605-784 A Bradley SD WBSTSDXADS0  640      
605-785 A Lake Norden SD CLRKSDXADS0  640      
605-793 A Castlewood SD CSWDSDXARS1  640      
605-794 A Toronto SD CLLKSDXADS0  640      
605-795 A Goodwin SD CLLKSDXADS0  640      
605-826 A Sinai SD BKNGSDXBDS0  640      
605-832 A Astoria SD CLLKSDXADS0  640      
605-873 A Estelline SD BKNGSDXBDS0  640      
605-874 A Clear Lake SD CLLKSDXADS0  640      
605-876 A Brandt SD CLLKSDXADS0  640      
605-947 A Waubay SD WABYSDXARS1  640      

Last updated: Sat, 14 Sep 2019 01:44:23 UTC

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