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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Switch: RDMDWAXADS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
425-755 A Kirkland WA 4324 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674   2024-02-14   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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