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: 389

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-389 A Buffalo Lake MN OSSEMNXODMD  593K MCC TELEPHONY LLC 628      
320-389 0 Buffalo Lake MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2017-05-29   
320-389 2 Buffalo Lake MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2022-07-18   
320-389 3 Buffalo Lake MN MPLSMNCDDSC  184D ONVOY, LLC - MN 628   2021-03-11   
320-389 4 Buffalo Lake MN STPLMNMKTMD  624H ONVOY SPECTRUM, LLC 628   2021-07-16   
320-389 5 Buffalo Lake MN MPLSMNCD9MD  5256 LEVEL 3 COMMUNICATIONS, LLC - MN 628   2023-02-25   
320-389 7 Buffalo Lake MN MPLSMNFD2MD  508J CENTURYLINK COMMUNICATIONS, LLC 628   2014-11-18   
320-389 8 Buffalo Lake MN MPLSMNCDZMD  073H TELNYX LLC 628   2020-07-09   
320-389 9 Buffalo Lake MN OSSEMNXODMD  593K MCC TELEPHONY LLC 628   2010-07-11   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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