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: 790

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-790 A Sioux Falls SD SXFLSDCONMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2026-06-07   
605-790 0 Sioux Falls SD SXFLSDCHIMD  106F BANDWIDTH.COM CLEC, LLC - SD 640   2026-06-27   
605-790 1 Sioux Falls SD SXFLSDCOTMD  162G ONVOY, LLC - SD 640   2026-06-27   
605-790 8 Sioux Falls SD   106F BANDWIDTH.COM CLEC, LLC - SD 640   2026-08-08   
605-790 9 Sioux Falls SD SXFLSDCONMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2026-06-07   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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