Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-465 A SXFLSDPSDS0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640      
605-543 A BRNDSDXA582  1642 ALLIANCE COMMUNICATIONS COOPERATIVE, INC. (BALTIC) 640      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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