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: ADMSMNXBDS0

Remotes:

Switch Switch name Switch type
CHGVMNXCRS0  CHERRY GROVE  1RC 
FONTMNXFRS0  FOUNTAIN  1RC 
LERYMNXBRS0  LE ROY  RSS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
507-582 A Adams MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-586 A South Adams IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-586 0 South Adams IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-586 1 South Adams IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-586 2 South Adams IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-586 3 South Adams IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-586 9 South Adams IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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