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: 206

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-206 A Richmond MN CLSPMNAL0MD  429A MIDCONTINENT COMMUNICATIONS - MN 626      
320-206 0 Richmond MN CLSPMNAL0MD  429A MIDCONTINENT COMMUNICATIONS - MN 626   2011-11-26   
320-206 7 Richmond MN   5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626   2025-02-16   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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