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: MNPLIAXCIMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
563-201 0 Dyersville IA 221F ONVOY, LLC - IA 634   2023-09-10   
563-613 8 Low Moor IA 221F ONVOY, LLC - IA 634   2023-10-15   
660-688 A Athens MO 093F ONVOY, LLC - MO 634      
660-688 0 Athens MO 093F ONVOY, LLC - MO 634   2022-10-28   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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