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.

Castle Rock, WA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
360-274 A CSRKWA01DS0  9638 QWEST CORPORATION 672      
360-967 A PTLGORIA7MD  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 672      
360-967 0 STTLWAWBDSH  159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 672      
360-967 1 PTLGORIA7MD  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 672      
360-967 2 PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672      
360-967 3 PTLDOR69X9X  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 672      
360-967 4 PTLGORIA7MD  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 672      
360-967 5 PTLDORWADS2  483E ONVOY, LLC - WA 672      
360-967 6 WDBNORBQDS0  937F ASTOUND BROADBAND, LLC - WA 672      
360-967 7 PTLDORWAXDX  508J CENTURYLINK COMMUNICATIONS, LLC 672      
360-967 8 PTLDORWADS2  483E ONVOY, LLC - WA 672      
360-967 9 STTLWAWBDSH  159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 672      
564-777 A PTLDOR13X9X  145J TERRA NOVA TELECOM INC. 672      
564-777 0 PTLDORWAX7Y  073H TELNYX LLC 672      
564-777 1 PTLDORWAX7Y  073H TELNYX LLC 672      
564-777 2 PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672      
564-777 5 PTLDORWADS2  483E ONVOY, LLC - WA 672      
564-777 6 PTLDORWADS2  483E ONVOY, LLC - WA 672      
564-777 7   145J TERRA NOVA TELECOM INC. 672      
564-777 9 STTLWAWBDSH  159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 672      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.