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: 350

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-350 A Danube MN STCDMNTOXXX  719F MCC TELEPHONY OF MINNESOTA, LLC - MN 626      
320-350 0 Danube MN   145J TERRA NOVA TELECOM INC. 626   2025-07-04   
320-350 1 Danube MN   184D ONVOY, LLC - MN 626   2023-09-03   
320-350 2 Danube MN   184D ONVOY, LLC - MN 626   2021-03-11   
320-350 3 Danube MN   184D ONVOY, LLC - MN 626   2020-05-26   
320-350 4 Danube MN   184D ONVOY, LLC - MN 626   2021-04-07   
320-350 5 Danube MN   624H ONVOY SPECTRUM, LLC 626   2024-12-19   
320-350 6 Danube MN   719F MCC TELEPHONY OF MINNESOTA, LLC - MN 626   2010-07-11   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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