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: ALBOMNXBRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
218-345 A Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 0 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 1 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 2 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 3 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 6 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 7 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 8 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      
218-345 9 Alborn MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 624      

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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