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.

Lake Lillian, MN

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
320-664 A LKLLMNXLRS0  1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 0   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 1   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 2   073H TELNYX LLC 626   2021-09-27   
320-664 3   184D ONVOY, LLC - MN 626   2015-06-19   
320-664 4   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 5   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 6   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 7   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 8   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-664 9   1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.