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: 276

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-276 A Renton WA STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
425-276 0 Renton WA STTLWAWBXYZ  073H TELNYX LLC 674   2020-12-11   
425-276 1 Renton WA STTLWAWBX7Z  006F BANDWIDTH.COM CLEC, LLC - WA 674   2020-10-03   
425-276 2 Renton WA STTLWAWBX7Z  006F BANDWIDTH.COM CLEC, LLC - WA 674   2013-11-11   
425-276 3 Renton WA STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
425-276 4 Renton WA STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
425-276 5 Renton WA STTLWA03X1X  318J COMCAST IP PHONE, LLC 674   2009-04-27   
425-276 6 Renton WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2014-02-24   
425-276 7 Renton WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2014-07-20   
425-276 8 Renton WA STTLWAWBDS1  483E ONVOY, LLC - WA 674   2017-10-06   
425-276 9 Renton WA STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.