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.
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Switch: STPHMNXSRS4

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
218-478 A Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 0 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 1 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 2 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 3 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 5 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 6 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 7 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 8 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      
218-478 9 Stephen MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 636      

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

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