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: RLMDILAGDS4

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-231 A Roselle IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2012-11-05   
224-554 A Deerfield IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2006-07-10   
815-887 A Harvard IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
847-847 A Lake Zurich IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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