Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 636

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

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

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