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: 425 [Rate centres in NPA 425] [Dial plan for NPA 425]

NXX: 455

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-455 A Bellevue WA BLLVWAGLDS0  9638 QWEST CORPORATION 674      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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