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.

Switch: STTLWAELDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
206-239 A Seattle WA 9638 QWEST CORPORATION 674      
206-256 A Seattle WA 9638 QWEST CORPORATION 674      
206-265 A Seattle WA 9638 QWEST CORPORATION 674      
206-269 A Seattle WA 9638 QWEST CORPORATION 674      
206-374 A Seattle WA 9638 QWEST CORPORATION 674      
206-404 A Seattle WA 9638 QWEST CORPORATION 674      
206-441 A Seattle WA 9638 QWEST CORPORATION 674      
206-443 A Seattle WA 9638 QWEST CORPORATION 674      
206-448 A Seattle WA 9638 QWEST CORPORATION 674      
206-615 A Seattle WA 9638 QWEST CORPORATION 674      
206-727 A Seattle WA 9638 QWEST CORPORATION 674      
206-728 A Seattle WA 9638 QWEST CORPORATION 674      
206-733 A Seattle WA 9638 QWEST CORPORATION 674      
206-770 A Seattle WA 9638 QWEST CORPORATION 674      
206-956 A Seattle WA 9638 QWEST CORPORATION 674      
206-965 A Seattle WA 9638 QWEST CORPORATION 674      

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

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