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: SXFLSDSERS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-371 A Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 0 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 1 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 2 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 3 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 4 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 5 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 8 Sioux Falls SD 9631 QWEST CORPORATION 640      
605-371 9 Sioux Falls SD 9631 QWEST CORPORATION 640      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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