Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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Beresford, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-300 A SXFLSDCONMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-300 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-300 1   145J TERRA NOVA TELECOM INC. 640   2025-08-01   
605-300 2   5562 METROPCS, INC. 640   2021-05-14   
605-751 A SXFLSDCHMMD  5562 METROPCS, INC. 640      
605-751 9   5562 METROPCS, INC. 640      
605-763 A BRFRSDXADS1  1649 BERESFORD MUNICIPAL TEL. CO. 640      

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

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