Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 743

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-743 A Clear Lake MN CLLKMNXADS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-743 0 Clear Lake MN CLSPMNAL0MD  429A MIDCONTINENT COMMUNICATIONS - MN 626   2011-10-14   
320-743 1 Clear Lake MN STCDMNTOX3X  184D ONVOY, LLC MN 626   2015-01-05   
320-743 2 Clear Lake MN CLLKMNXADS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-743 3 Clear Lake MN CLLKMNXADS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-743 4 Clear Lake MN CLLKMNXADS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-743 5 Clear Lake MN CLLKMNXADS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-743 6 Clear Lake MN STCDMNTOX3X  184D ONVOY, LLC MN 626   2016-07-29   
320-743 7 Clear Lake MN STCDMNTOXQX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 626   2016-12-12   
320-743 8 Clear Lake MN STCDMNTOXRX  980E BANDWIDTH.COM CLEC, LLC - MN 626   2008-11-30   
320-743 9 Clear Lake MN CLLKMNXADS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.