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: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 338

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-338 A Granite Falls MN STCDMNTOX0X  5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-338 0 Granite Falls MN STCDMNTOX0X  5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626      
320-338 7 Granite Falls MN STCDMNTOX3X  184D ONVOY, LLC - MN 626   2012-06-01   

Last updated: Tue, 30 May 2023 01:08:39 UTC

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