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: 343

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-343 A Clinton MN STCDMNTOXXX  719F MCC TELEPHONY OF MINNESOTA, LLC - MN 626      
320-343 1 Clinton MN   184D ONVOY, LLC - MN 626   2023-09-03   
320-343 2 Clinton MN   184D ONVOY, LLC - MN 626   2021-12-19   
320-343 3 Clinton MN   5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626   2023-02-25   
320-343 4 Clinton MN   2629 FEDERATED TELEPHONE COOPERATIVE - MN 626   2015-05-11   
320-343 5 Clinton MN   624H ONVOY SPECTRUM, LLC 626   2024-12-19   
320-343 7 Clinton MN   508J CENTURYLINK COMMUNICATIONS, LLC 626   2017-06-20   
320-343 9 Clinton MN   719F MCC TELEPHONY OF MINNESOTA, LLC - MN 626   2010-07-11   

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

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