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: SXFLSDPS5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-200 4 Dupree SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-208 7 Winner SD 145J TERRA NOVA TELECOM INC. 640   2026-06-05   
605-233 2 Clark SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-268 6 Sisseton SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-281 7 Bowdle SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-300 3 Beresford SD 145J TERRA NOVA TELECOM INC. 640   2026-06-05   
605-440 4 Custer SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-469 2 Lake Andes SD 145J TERRA NOVA TELECOM INC. 640   2026-06-05   
605-551 1 Britton SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-639 4 Spearfish SD 145J TERRA NOVA TELECOM INC. 640   2026-03-29   
605-686 8 Estelline SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-769 2 Gettysburg SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-800 A Sioux Falls SD 145J TERRA NOVA TELECOM INC. 640      
605-830 8 Gregory SD 145J TERRA NOVA TELECOM INC. 640   2026-06-05   
605-848 6 Glenham SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-870 6 Highmore SD 145J TERRA NOVA TELECOM INC. 640   2026-06-05   
605-922 2 Elkton SD 145J TERRA NOVA TELECOM INC. 640   2026-04-30   
605-931 3 Huron SD 145J TERRA NOVA TELECOM INC. 640   2026-03-29   
605-980 0 Martin SD 145J TERRA NOVA TELECOM INC. 640   2026-06-05   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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