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: LPCYIAXODS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-342 A La Porte City IA 1220 LA PORTE CITY TEL. CO. 635      
319-475 A Mount Auburn IA 1220 LA PORTE CITY TEL. CO. 635      

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

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