Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 206 [Rate centres in NPA 206] [Dial plan for NPA 206]

NXX: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
206-456 A Seattle WA STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
206-456 0 Seattle WA   483E ONVOY, LLC - WA 674      
206-456 1 Seattle WA   483E ONVOY, LLC - WA 674      
206-456 2 Seattle WA   483E ONVOY, LLC - WA 674      
206-456 3 Seattle WA   483E ONVOY, LLC - WA 674   2010-07-19   
206-456 4 Seattle WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2010-10-06   
206-456 5 Seattle WA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674   2010-08-14   
206-456 6 Seattle WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2010-10-06   
206-456 7 Seattle WA   483E ONVOY, LLC - WA 674   2010-11-17   
206-456 8 Seattle WA   483E ONVOY, LLC - WA 674   2010-11-17   
206-456 9 Seattle WA   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2011-04-08   

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

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