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.

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

NXX: 566

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-566 A Renton WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-03-10   
425-566 0 Renton WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-03-10   
425-566 9 Renton WA   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-08-24   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.