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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South Haven, MN

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
320-236 A ANDLMNXBDS0  1414 WINDSTREAM LAKEDALE, INC. 628      
320-636 A MPLSMNCDKMD  4156 TEKSTAR COMMUNICATIONS, INC. 628      
320-636 1   4156 TEKSTAR COMMUNICATIONS, INC. 628   2018-04-27   
320-636 2   5256 LEVEL 3 COMMUNICATIONS, LLC - MN 628   2021-06-01   
320-636 6   145J TERRA NOVA TELECOM INC. 628   2025-05-31   
320-636 8   490J DISH WIRELESS, LLC 628   2023-11-15   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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