Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Selby, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-643 A SXFLSDPSDS0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640      
605-643 5   7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2016-03-25   
605-649 A HGHMSDXADS1  1680 VENTURE COMMUNICATIONS COOPERATIVE 640      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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