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: 523

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-523 A Olivia MN OLIVMNOLRS5  9631 QWEST CORPORATION 626      
320-523 0 Olivia MN STCDMNTOX0X  5256 LEVEL 3 COMMUNICATIONS, LLC - MN 626   2006-03-31   
320-523 1 Olivia MN OLIVMNOLRS5  9631 QWEST CORPORATION 626      
320-523 2 Olivia MN OLIVMNOLRS5  9631 QWEST CORPORATION 626      
320-523 3 Olivia MN OLIVMNOLRS5  9631 QWEST CORPORATION 626      
320-523 5 Olivia MN OLIVMNOLRS5  9631 QWEST CORPORATION 626      
320-523 6 Olivia MN STCDMNTOXRX  980E BANDWIDTH.COM CLEC, LLC - MN 626   2008-11-30   
320-523 7 Olivia MN STCDMNTOX3X  184D ONVOY, LLC - MN 626   2007-03-18   
320-523 8 Olivia MN STCDMNTOX3X  184D ONVOY, LLC - MN 626   2006-08-06   
320-523 9 Olivia MN STCDMNTOXXX  719F MCC TELEPHONY OF MINNESOTA, LLC - MN 626   2010-05-16   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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