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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OCN: 1657 ALLIANCE COMM. COOPERATIVE, INC. (SPLIT ROCK)

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
507-597 A East Garretson MN BRNDSDXA582  640      
605-482 A Oldham-Ramona SD BRNDSDXA582  640      
605-582 A Brandon SD BRNDSDXA582  640      
605-594 A Garretson SD BRNDSDXA582  640      
605-772 A Howard SD BRNDSDXA582  640      

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

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