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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Cavour, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-599 A CAVRSDCORS1  9631 QWEST CORPORATION 640      
605-599 0 CAVRSDCORS1  9631 QWEST CORPORATION 640      
605-599 1 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-599 2 CAVRSDCORS1  9631 QWEST CORPORATION 640      
605-599 3 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-599 4 SXFLSDPS0MD  073H TELNYX LLC 640      
605-599 5 SXFLSDCOLMD  508J CENTURYLINK COMMUNICATIONS, LLC 640      
605-599 6 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-599 7 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-599 8 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-599 9 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-634 A SXFLSDPSCMD  516J TON80 COMMUNICATIONS, LLC 640      
605-634 0 SXFLSDCOTMD  162G ONVOY, LLC - SD 640      
605-634 1 SXFLSDCORMD  5180 LEVEL 3 COMMUNICATIONS, LLC - SD 640      
605-634 2 SXFLSDPSCMD  516J TON80 COMMUNICATIONS, LLC 640      

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

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