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

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
563-855 7 Worthington IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-08   
563-870 7 Holy Cross IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-06   
563-876 7 Epworth IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-05   
563-893 7 Bennett IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-04   
563-923 8 Earlville IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-05   
563-944 6 Lowden IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-06   
563-945 7 Stanwood IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-07   
563-946 7 Rochester IA 508J CENTURYLINK COMMUNICATIONS, LLC 634   2016-10-07   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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