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: CLRKSDXADS0

Remotes:

Switch Switch name Switch type
BRYNSD01RS0  BRYANT  DLM 
HAYTSDXARS1  HAYTI  AXR 
LKNRSD01RS0  LAKE NORDEN  DLM 
WLLKSDXARS6  WILLOW LAKE  AXR 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-532 A Clark SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-625 A Bryant-Willow Lake SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-628 A Bryant-Willow Lake SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-783 A Hayti SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      
605-785 A Lake Norden SD 1651 INTERSTATE TELECOM COOP, INC. - SD 640      

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

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