Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-674 A Big Stone City SD STCDMNTOX3X  162G ONVOY, LLC - SD 626      
605-674 0 Big Stone City SD   073H TELNYX LLC 626   2021-01-04   
605-674 1 Big Stone City SD   162G ONVOY, LLC - SD 626   2021-07-08   
605-674 2 Big Stone City SD   162G ONVOY, LLC - SD 626   2021-02-12   
605-674 3 Big Stone City SD   162G ONVOY, LLC - SD 626   2020-10-26   
605-674 4 Big Stone City SD   162G ONVOY, LLC - SD 626   2020-10-26   
605-674 5 Big Stone City SD   162G ONVOY, LLC - SD 626   2020-04-16   
605-674 6 Big Stone City SD   162G ONVOY, LLC - SD 626   2020-08-20   
605-674 7 Big Stone City SD   162G ONVOY, LLC - SD 626   2020-08-20   
605-674 8 Big Stone City SD   162G ONVOY, LLC - SD 626   2021-02-12   
605-674 9 Big Stone City SD   624H ONVOY SPECTRUM, LLC 626   2021-07-18   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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