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: 363J VALLEY COMMUNICATIONS, INC. D/B/A VALLEY FIBERCOM

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
605-315 2 Arlington SD SXFLSDCOX6X  640   2019-09-12   
605-316 4 Iroquois SD SXFLSDCOX6X  640   2021-02-27   
605-525 A Lake Preston SD SXFLSDCOX6X  640      
605-525 2 Lake Preston SD SXFLSDCOX6X  640   2019-10-24   
605-534 5 Flandreau SD SXFLSDCOX6X  640   2020-09-19   
605-827 A Volga SD SXFLSDCOX6X  640      
605-827 2 Volga SD SXFLSDCOX6X  640   2019-02-04   
605-860 2 De Smet SD SXFLSDCOX6X  640   2019-09-12   

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

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