Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-410 A SXFLSDPSDS0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640      
605-410 0   145J TERRA NOVA TELECOM INC. 640   2025-08-01   
605-410 5 SXFLSDPSDS0  7076 MIDCONTINENT COMMUNICATIONS. - SD 640   2017-10-15   
605-426 A HRRDSDXADS1  1685 VALLEY TELECOM COOP. ASSN., INC. 640      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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