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.

Switch: CLWRMNXCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
320-558 A Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-558 0 Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-558 2 Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-558 4 Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-558 5 Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-558 6 Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      
320-558 9 Clearwater MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 626      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.