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.
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Switch: STTLWADJDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
206-543 A Seattle WA 577F RINGSQUARED TELECOM LLC 674      
206-562 0 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 1 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 2 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 3 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 4 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 5 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 6 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 7 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 8 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-562 9 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2019-05-31   
206-616 A Seattle WA 577F RINGSQUARED TELECOM LLC 674      
206-707 0 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2009-08-20   
206-707 7 Seattle WA 577F RINGSQUARED TELECOM LLC 674   2009-08-21   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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