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: 422

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-422 A Wheaton MN STCDMNTOX3X  184D ONVOY, LLC - MN 626      
320-422 0 Wheaton MN   719F MCC TELEPHONY OF MINNESOTA, LLC - MN 626   2010-05-16   
320-422 1 Wheaton MN   184D ONVOY, LLC - MN 626   2016-05-06   
320-422 2 Wheaton MN   184D ONVOY, LLC - MN 626   2017-11-09   
320-422 3 Wheaton MN   184D ONVOY, LLC - MN 626   2021-03-11   
320-422 4 Wheaton MN   5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626   2023-01-20   
320-422 5 Wheaton MN   184D ONVOY, LLC - MN 626   2021-04-07   
320-422 6 Wheaton MN   508J CENTURYLINK COMMUNICATIONS, LLC 626   2017-06-23   
320-422 7 Wheaton MN   184D ONVOY, LLC - MN 626   2004-06-17   
320-422 8 Wheaton MN   073H TELNYX LLC 626   2020-07-23   
320-422 9 Wheaton MN   8405 TELEPORT COMMUNICATIONS AMERICA, LLC - MN 626   2022-06-12   

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

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