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: SLTRIAXOPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
515-579 A Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-579 9 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632   2018-03-17   
515-685 A Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-685 1 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-685 2 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-685 3 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-685 4 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-685 5 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
515-685 9 Slater IA 1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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