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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

OCN: 1685 VALLEY TELECOM COOP. ASSN., INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
605-283 A Hosmer SD HRRDSDXADS1  640      
605-284 A Eureka SD HRRDSDXADS1  640      
605-426 A Ipswich SD HRRDSDXADS1  640      
605-437 A Herreid SD HRRDSDXADS1  640      
605-439 A Leola SD HRRDSDXADS1  640      
605-577 A Long Lake SD HRRDSDXADS1  640      
605-762 A Glenham SD HRRDSDXADS1  640      
605-889 A Pollock SD HRRDSDXADS1  640      
605-955 A Mound City SD HRRDSDXADS1  640      

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

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