Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-525 9 Lake Preston SD 162G ONVOY, LLC - SD 640   2021-03-13   
605-534 1 Flandreau SD 162G ONVOY, LLC - SD 640   2012-12-19   
605-534 7 Flandreau SD 162G ONVOY, LLC - SD 640   2009-05-28   
605-534 8 Flandreau SD 162G ONVOY, LLC - SD 640   2011-09-15   
605-546 1 Iroquois SD 162G ONVOY, LLC - SD 640   2012-12-19   
605-546 5 Iroquois SD 162G ONVOY, LLC - SD 640   2013-12-18   
605-546 6 Iroquois SD 162G ONVOY, LLC - SD 640   2013-12-18   
605-546 7 Iroquois SD 162G ONVOY, LLC - SD 640   2009-05-28   
605-546 8 Iroquois SD 162G ONVOY, LLC - SD 640   2019-09-13   
605-546 9 Iroquois SD 162G ONVOY, LLC - SD 640   2011-10-28   
605-550 7 Mitchell SD 162G ONVOY, LLC - SD 640   2013-12-16   
605-550 8 Mitchell SD 162G ONVOY, LLC - SD 640   2013-12-16   
605-556 6 Madison SD 162G ONVOY, LLC - SD 640   2021-10-10   
605-566 A Spearfish SD 162G ONVOY, LLC - SD 640      
605-566 0 Spearfish SD 162G ONVOY, LLC - SD 640   2019-05-24   
605-566 3 Spearfish SD 162G ONVOY, LLC - SD 640   2021-03-13   
605-566 4 Spearfish SD 162G ONVOY, LLC - SD 640   2021-03-13   
605-566 5 Spearfish SD 162G ONVOY, LLC - SD 640   2020-07-13   
605-566 6 Spearfish SD 162G ONVOY, LLC - SD 640   2020-07-13   
605-566 7 Spearfish SD 162G ONVOY, LLC - SD 640   2009-07-02   
605-569 5 Belle Fourche SD 162G ONVOY, LLC - SD 640   2017-11-04   
605-569 7 Belle Fourche SD 162G ONVOY, LLC - SD 640   2009-05-28   
605-570 4 Huron SD 162G ONVOY, LLC - SD 640   2020-10-23   
605-570 5 Huron SD 162G ONVOY, LLC - SD 640   2019-09-13   
605-570 7 Huron SD 162G ONVOY, LLC - SD 640   2019-11-07   
605-570 8 Huron SD 162G ONVOY, LLC - SD 640   2019-11-07   
605-570 9 Huron SD 162G ONVOY, LLC - SD 640   2020-12-07   
605-574 5 Hill City SD 162G ONVOY, LLC - SD 640   2012-12-19   
605-574 6 Hill City SD 162G ONVOY, LLC - SD 640   2013-12-18   
605-574 7 Hill City SD 162G ONVOY, LLC - SD 640   2009-05-28   
605-574 8 Hill City SD 162G ONVOY, LLC - SD 640   2011-10-28   
605-578 6 Spearfish SD 162G ONVOY, LLC - SD 640   2009-05-28   
605-591 1 Spearfish SD 162G ONVOY, LLC - SD 640   2021-12-16   
605-597 3 Mitchell SD 162G ONVOY, LLC - SD 640   2021-07-08   
605-597 4 Mitchell SD 162G ONVOY, LLC - SD 640   2020-12-07   
605-597 5 Mitchell SD 162G ONVOY, LLC - SD 640   2020-12-07   
605-597 7 Mitchell SD 162G ONVOY, LLC - SD 640   2012-01-30   
605-597 8 Mitchell SD 162G ONVOY, LLC - SD 640   2021-07-08   
605-599 1 Cavour SD 162G ONVOY, LLC - SD 640   2012-12-19   
605-599 3 Cavour SD 162G ONVOY, LLC - SD 640   2019-09-13   
605-599 6 Cavour SD 162G ONVOY, LLC - SD 640   2013-12-18   
605-599 7 Cavour SD 162G ONVOY, LLC - SD 640   2009-07-13   
605-599 8 Cavour SD 162G ONVOY, LLC - SD 640   2012-02-23   
605-599 9 Cavour SD 162G ONVOY, LLC - SD 640   2013-12-18   
605-600 1 Rapid City SD 162G ONVOY, LLC - SD 640   2020-12-07   
605-600 2 Rapid City SD 162G ONVOY, LLC - SD 640   2019-07-08   
605-600 3 Rapid City SD 162G ONVOY, LLC - SD 640   2019-07-08   
605-600 4 Rapid City SD 162G ONVOY, LLC - SD 640   2019-05-05   
605-600 5 Rapid City SD 162G ONVOY, LLC - SD 640   2019-05-05   
605-600 6 Rapid City SD 162G ONVOY, LLC - SD 640   2019-05-05   

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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