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: ARMSIAXPPS0

Remotes:

Switch Switch name Switch type
DLVRIAXORL0  DOLLIVER  GTR 
DLVRIAXORP0  DOLLIVER  RP 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
712-206 A Armstrong IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-206 9 Armstrong IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630   2018-03-18   
712-864 A Armstrong IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-864 1 Armstrong IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-864 3 Armstrong IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      
712-864 7 Armstrong IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 630      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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