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: CDRRIADTX2X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-205 A Mount Vernon IA 508J CENTURYLINK COMMUNICATIONS LLC 635      
319-249 A Cedar Rapids IA 508J CENTURYLINK COMMUNICATIONS LLC 635      
319-281 A Hudson IA 508J CENTURYLINK COMMUNICATIONS LLC 635      
319-888 A Waterloo IA 508J CENTURYLINK COMMUNICATIONS LLC 635      

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

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