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.

Switch: SXFLSDPS5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-203 2 Lake Preston SD 145J TERRA NOVA TELECOM INC. 640   2024-11-20   
605-510 1 Rapid City SD 145J TERRA NOVA TELECOM INC. 640   2024-02-15   
605-522 5 Yankton SD 145J TERRA NOVA TELECOM INC. 640   2024-02-16   
605-550 5 Mitchell SD 145J TERRA NOVA TELECOM INC. 640   2024-02-15   
605-580 2 Spearfish SD 145J TERRA NOVA TELECOM INC. 640   2024-05-10   
605-675 8 Vermillion SD 145J TERRA NOVA TELECOM INC. 640   2024-05-10   
605-800 A Sioux Falls SD 145J TERRA NOVA TELECOM INC. 640      
605-805 8 Pierre SD 145J TERRA NOVA TELECOM INC. 640   2024-02-15   
605-864 5 Flandreau SD 145J TERRA NOVA TELECOM INC. 640   2024-08-22   
605-868 7 Watertown SD 145J TERRA NOVA TELECOM INC. 640   2024-04-23   
605-888 0 Chamberlain SD 145J TERRA NOVA TELECOM INC. 640   2024-02-05   
605-920 2 Spearfish SD 145J TERRA NOVA TELECOM INC. 640   2024-11-15   
605-930 0 Volga SD 145J TERRA NOVA TELECOM INC. 640   2024-02-15   
605-960 0 Huron SD 145J TERRA NOVA TELECOM INC. 640   2024-11-15   
605-960 6 Huron SD 145J TERRA NOVA TELECOM INC. 640   2024-05-10   
701-815 3 North McIntosh ND 145J TERRA NOVA TELECOM INC. 640   2024-02-14   
712-888 0 Beloit IA 145J TERRA NOVA TELECOM INC. 640   2024-02-13   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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