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: DCRHIACODS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
563-277 5 Decorah IA 9631 QWEST CORPORATION 635   2014-08-30   
563-382 A Decorah IA 9631 QWEST CORPORATION 635      
563-387 A Decorah IA 9631 QWEST CORPORATION 635      
563-387 0 Decorah IA 9631 QWEST CORPORATION 635      
563-387 1 Decorah IA 9631 QWEST CORPORATION 635      
563-387 2 Decorah IA 9631 QWEST CORPORATION 635      
563-387 3 Decorah IA 9631 QWEST CORPORATION 635      
563-387 4 Decorah IA 9631 QWEST CORPORATION 635      
563-387 5 Decorah IA 9631 QWEST CORPORATION 635      

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

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