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.
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Switch: GNCTIA093MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-345 8 Reinbeck IA 346F HEART OF IOWA VENTURES, L.L.C. - IA 635   2025-05-22   
319-418 A Grundy Center IA 346F HEART OF IOWA VENTURES, L.L.C. - IA 635   2025-09-28   
319-418 8 Grundy Center IA 346F HEART OF IOWA VENTURES, L.L.C. - IA 635   2025-09-28   

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

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