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: SXCYIADT9MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
712-955 0 Merrill IA 221F ONVOY, LLC - IA 630   2023-05-10   
712-966 4 Le Mars IA 221F ONVOY, LLC - IA 630   2021-03-08   
712-966 5 Le Mars IA 221F ONVOY, LLC - IA 630   2021-03-08   
712-966 7 Le Mars IA 221F ONVOY, LLC - IA 630   2020-10-02   
712-966 8 Le Mars IA 221F ONVOY, LLC - IA 630   2024-03-07   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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