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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Switch: CLMASDXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-396 A Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 0 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 1 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 2 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 3 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 4 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 5 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 6 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 8 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      
605-396 9 Columbia SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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