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: 206 [Rate centres in NPA 206] [Dial plan for NPA 206]

NXX: 787

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
206-787 A Seattle WA STTLWACHDS0  9638 QWEST CORPORATION 674      
206-787 0 Seattle WA   6529 T-MOBILE USA, INC. 674   2009-06-11   
206-787 1 Seattle WA   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2009-05-14   
206-787 2 Seattle WA   6529 T-MOBILE USA, INC. 674   2009-06-11   
206-787 3 Seattle WA   9638 QWEST CORPORATION 674   2009-01-12   
206-787 4 Seattle WA   9638 QWEST CORPORATION 674   2009-01-12   
206-787 5 Seattle WA   9638 QWEST CORPORATION 674   2009-01-12   
206-787 6 Seattle WA   9638 QWEST CORPORATION 674   2009-01-12   
206-787 7 Seattle WA   9638 QWEST CORPORATION 674   2009-01-12   
206-787 8 Seattle WA   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2009-09-06   
206-787 9 Seattle WA   006F BANDWIDTH.COM CLEC, LLC - WA 674   2009-03-16   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.