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: KNYNMNXADS0

Remotes:

Switch Switch name Switch type
ALDNMNXB2MD    POI 
CLMTMNXARS0  CLAREMONT  1RE 
DDCTMNXDRS0  DODGE CENTER  RSS 
KSTRMNXL0MD    POI 
WCNCMNXWRS0  WEST CONCORD  RSC 
WNMNMNXWRS0  WANAMINGO  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
507-789 A Kenyon MN 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-298 A Amund IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-298 0 Amund IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-298 1 Amund IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-298 2 Amund IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-298 3 Amund IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      
641-298 9 Amund IA 1123 CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 620      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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