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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NPA: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 779

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-779 A Kalona IA NLBTIAXO2MD  593K MCC TELEPHONY LLC 635      
319-779 1 Kalona IA   593K MCC TELEPHONY LLC 635   2010-05-15   
319-779 9 Kalona IA   145J TERRA NOVA TELECOM INC. 635   2025-05-31   

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

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