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: DVNPIAEAGMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
563-206 A Clinton IA 508J CENTURYLINK COMMUNICATIONS LLC 634      
563-214 A Davenport IA 508J CENTURYLINK COMMUNICATIONS LLC 634      
563-521 A Maquoketa IA 508J CENTURYLINK COMMUNICATIONS LLC 634      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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