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: 571

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-571 A Issaquah WA PLSBWAXXX0X  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2025-02-09   
425-571 0 Issaquah WA STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-10-08   
425-571 2 Issaquah WA STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-10-27   
425-571 5 Issaquah WA STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-04-23   
425-571 6 Issaquah WA STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2025-04-23   
425-571 7 Issaquah WA PLSBWAXXX0X  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2025-12-26   
425-571 8 Issaquah WA STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2026-06-22   
425-571 9 Issaquah WA PLSBWAXXX0X  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2025-02-09   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.