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.

Seattle, WA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
206-435 8   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2014-01-04   
206-435 9   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2014-01-04   
206-436 A TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 0 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 1 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 2 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 3 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 4   483E ONVOY, LLC - WA 674   2008-07-12   
206-436 5 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 6 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 7 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 8 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-436 9 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2006-09-16   
206-437 A STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 0 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 1 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 2 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 3 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 4 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 5 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 6 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 7 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-437 8 PLSBWAXXX0X  6010 NEW CINGULAR WIRELESS PCS, LLC 674   2005-03-22   
206-437 9 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-11-17   
206-438 A STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 0 STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 1 STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 2 STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 3 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2006-06-11   
206-438 4 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2006-06-11   
206-438 5 STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 6 STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 7   145J TERRA NOVA TELECOM INC. 674   2025-11-10   
206-438 8 STTLWAWBDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674      
206-438 9 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2006-06-11   
206-439 A STTLWACHDS0  9638 QWEST CORPORATION 674      
206-440 A STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 0 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 1 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 2 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 3 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 4 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 5 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 6 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2024-07-24   
206-440 7 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 8 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-440 9 STTLWA04DS0  9638 QWEST CORPORATION 674      
206-441 A STTLWAELDS0  9638 QWEST CORPORATION 674      
206-442 A STTLWA06DS4  9638 QWEST CORPORATION 674      
206-443 A STTLWAELDS0  9638 QWEST CORPORATION 674      
206-444 A STTLWACHDS0  9638 QWEST CORPORATION 674      
206-445 A STTLWAWBDS1  483E ONVOY, LLC - WA 674      
206-445 0 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2009-10-08   
206-445 1 STTLWAWBDS1  483E ONVOY, LLC - WA 674   2009-07-15   
206-445 2 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-10-21   
206-445 3 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-12-02   
206-445 4 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-12-02   
206-445 5 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-11-13   
206-445 6 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2015-08-09   
206-445 7 STTLWAWBDS1  483E ONVOY, LLC - WA 674   2009-09-27   
206-445 8 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-12-08   
206-445 9 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-12-29   
206-446 A STTLWA060MD  6529 T-MOBILE USA, INC. 674      
206-446 0 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 1 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 2 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 3 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 4 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 5 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 6 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 7 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-446 8 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2008-02-28   
206-446 9 STTLWA060MD  6529 T-MOBILE USA, INC. 674   2007-06-17   
206-447 A STTLWA06DS4  9638 QWEST CORPORATION 674      
206-448 A STTLWAELDS0  9638 QWEST CORPORATION 674      
206-449 A STTLWA06DS4  9638 QWEST CORPORATION 674      
206-450 A STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-450 0 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 1 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 2 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 3 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 4 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 5 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 6 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 7 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 8 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-450 9 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2006-10-09   
206-452 A STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674      
206-452 0 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-29   
206-452 1 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 2 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 3 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 4 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 5 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 6 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 7 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2008-06-30   
206-452 8 TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2008-06-30   
206-452 9 STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2009-09-14   
206-453 A STTLWA060MD  6529 T-MOBILE USA, INC. 674      
206-453 0 STTNWAHODSC  6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2007-10-08   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.