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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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
515-870 A Swea City IA SWCYIAAD0MD  632      
515-870 8 Swea City IA SWCYIAAD0MD  632   2017-09-14   
712-868 A Armstrong IA ARMSIAXODS0  630      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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