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: RPCYSDCODS1

Remotes:

Switch Switch name Switch type
BLFRSDCORS1  BELLE FOURCHE  5ER 
BLHKSDCERS1  BLACKHAWK  5ER 
DDWDSDCORS1  DEADWOOD  5ER 
HLCYSDCORS1  HILL CITY  5ER 
LEADSDCORS1  LEAD  5ER 
RPVYSDCORS1  RAPID VALLEY  5ER 
SPRFSDCORS1  SPEARFISH  5ER 
STRGSDCORS1  STURGIS  5ER 
WHWDSDCORS1  WHITEWOOD  5ER 
WRWKSDCORS1  WARWICK  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-341 A Rapid City SD 9631 QWEST CORPORATION 640      
605-342 A Rapid City SD 9631 QWEST CORPORATION 640      
605-343 A Rapid City SD 9631 QWEST CORPORATION 640      
605-348 A Rapid City SD 9631 QWEST CORPORATION 640      
605-355 A Rapid City SD 9631 QWEST CORPORATION 640      
605-388 A Rapid City SD 9631 QWEST CORPORATION 640      
605-388 0 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 1 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 3 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 4 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 5 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 6 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 8 Rapid City SD 9631 QWEST CORPORATION 640      
605-388 9 Rapid City SD 9631 QWEST CORPORATION 640      
605-394 A Rapid City SD 9631 QWEST CORPORATION 640      
605-399 A Rapid City SD 9631 QWEST CORPORATION 640      
605-727 A Rapid City SD 9631 QWEST CORPORATION 640      
605-737 A Rapid City SD 9631 QWEST CORPORATION 640      
605-877 A Rapid City SD 9631 QWEST CORPORATION 640      
605-877 7 Rapid City SD 9631 QWEST CORPORATION 640      
605-877 8 Rapid City SD 9631 QWEST CORPORATION 640      
605-877 9 Rapid City SD 9631 QWEST CORPORATION 640      

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

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