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: 631

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
206-631 A Seattle WA STTLWA060MD  6529 T-MOBILE USA, INC. 674      
206-631 0 Seattle WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2008-02-28   
206-631 1 Seattle WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2008-02-28   
206-631 2 Seattle WA TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2007-06-22   
206-631 3 Seattle WA STTLWACHDS0  9638 QWEST CORPORATION 674   2007-05-22   
206-631 4 Seattle WA STTLWACHDS0  9638 QWEST CORPORATION 674   2007-05-22   
206-631 5 Seattle WA STTLWACHDS0  9638 QWEST CORPORATION 674   2007-05-22   
206-631 6 Seattle WA STTLWACHDS0  9638 QWEST CORPORATION 674   2007-05-22   
206-631 7 Seattle WA STTLWACHDS0  9638 QWEST CORPORATION 674   2007-05-22   
206-631 8 Seattle WA TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2007-06-04   
206-631 9 Seattle WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-05-20   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.