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: CDRRIADTKMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-238 A Oelwein IA 221F ONVOY, LLC IA 635      
319-318 A Vinton IA 221F ONVOY, LLC IA 635      
319-432 A Cedar Rapids IA 221F ONVOY, LLC IA 635      
319-449 A Cedar Rapids IA 221F ONVOY, LLC IA 635      
319-538 A Cedar Rapids IA 221F ONVOY, LLC IA 635      
319-575 A Cedar Falls IA 221F ONVOY, LLC IA 635      
319-727 A Coggon IA 221F ONVOY, LLC IA 635      
507-502 A North Chester MN 184D ONVOY, LLC MN 635      
563-276 A Waukon IA 221F ONVOY, LLC IA 635      
563-800 A Calmar IA 221F ONVOY, LLC IA 635      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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