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: 573

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-573 A Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 0 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 1 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 2 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 3 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 4 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 5 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 6 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 7 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 8 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   
425-573 9 Everett WA   7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 674   2025-10-27   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.