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: SXFLSDCODS1

Remotes:

Switch Switch name Switch type
ARTNSDCORS1  ARLINGTON  5ER 
HRBGSDCORS1  HARRISBURG  5ER 
MDSNSDCERS1  MADISON  5ER 
MTCHSDCORS1  MITCHELL  5ER 
SXFLSDSERS1  SIOUX FALLS SE  5ER 
TEA SDCORS1  TEA  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-679 A Sioux Falls SD 9631 QWEST CORPORATION 640      
605-679 2 Sioux Falls SD 9631 QWEST CORPORATION 640   2012-10-14   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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