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: 479

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-479 A Renton WA TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2024-01-25   
425-479 0 Renton WA STTLWAWBXYZ  073H TELNYX LLC 674   2024-02-04   
425-479 1 Renton WA STTLWAWBXSZ  939H COMMIO, LLC 674   2024-04-18   
425-479 5 Renton WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2024-04-05   
425-479 6 Renton WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2024-04-05   
425-479 7 Renton WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2024-04-05   
425-479 8 Renton WA TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2024-01-25   
425-479 9 Renton WA TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2024-01-25   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.