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
206-740 7   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2011-10-28   
206-740 8   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2011-10-28   
206-740 9   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2011-10-28   
206-741 A STTLWAWB16Z  597F VOIP INNOVATIONS, LLC 674      
206-741 0   159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 674   2019-09-21   
206-741 1   597F VOIP INNOVATIONS, LLC 674   2019-09-20   
206-741 2   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2019-09-25   
206-741 3   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2019-09-25   
206-741 4   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2019-09-25   
206-741 5   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2019-09-25   
206-741 6   6529 T-MOBILE USA, INC. 674   2019-09-21   
206-741 7   6529 T-MOBILE USA, INC. 674   2019-09-21   
206-741 8   6529 T-MOBILE USA, INC. 674   2019-09-21   
206-741 9   6529 T-MOBILE USA, INC. 674   2019-09-21   
206-743 A STTLWAWBDSH  159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 674      
206-743 0   159F PEERLESS NETWORK OF WASHINGTON, LLC - WA 674   2011-02-19   
206-743 1   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2011-05-17   
206-743 2   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2011-05-17   
206-743 3   515J IP HORIZON LLC 674   2011-02-22   
206-743 4   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2011-05-17   
206-743 5   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2011-06-06   
206-743 6   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2011-06-06   
206-743 7   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2011-06-06   
206-743 8   318J COMCAST IP PHONE, LLC 674   2011-06-05   
206-743 9   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 674   2011-06-11   
206-744 A TKWLWAZSPS0  7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674      
206-744 0   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 1   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 2   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 3   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 4   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 5   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 6   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 7   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 8   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-744 9   7173 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 674   2004-04-04   
206-747 A TACNWADNCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 674      
206-747 0   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 1   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 2   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 3   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 4   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 5   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 6   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 7   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 8   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-747 9   6010 NEW CINGULAR WIRELESS PCS, LLC 674   2011-12-01   
206-748 A STTLWA06DS4  9638 QWEST CORPORATION 674      
206-749 A STTLWA06DS4  9638 QWEST CORPORATION 674      
206-750 A STTLWA03XMD  624H ONVOY SPECTRUM, LLC 674      
206-750 0   624H ONVOY SPECTRUM, LLC 674   2022-09-16   
206-750 1   624H ONVOY SPECTRUM, LLC 674   2022-09-16   
206-750 2   624H ONVOY SPECTRUM, LLC 674   2022-09-16   
206-750 3   624H ONVOY SPECTRUM, LLC 674   2022-09-16   
206-750 4   624H ONVOY SPECTRUM, LLC 674   2022-09-16   
206-750 5   6529 T-MOBILE USA, INC. 674   2022-09-17   
206-750 6   6529 T-MOBILE USA, INC. 674   2022-09-17   
206-750 7   6529 T-MOBILE USA, INC. 674   2022-09-17   
206-750 8   073H TELNYX LLC 674   2022-09-17   
206-750 9   073H TELNYX LLC 674   2022-09-17   
206-751 A STTLWA060MD  6529 T-MOBILE USA, INC. 674      
206-751 0   5562 METROPCS, INC. 674   2017-05-09   
206-751 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 674   2017-05-16   
206-751 2   5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674   2018-01-31   
206-751 3   6529 T-MOBILE USA, INC. 674   2017-05-12   
206-751 4   6529 T-MOBILE USA, INC. 674   2017-05-12   
206-751 5   6529 T-MOBILE USA, INC. 674   2017-05-12   
206-751 6   6529 T-MOBILE USA, INC. 674   2017-05-12   
206-751 7   6529 T-MOBILE USA, INC. 674   2017-05-08   
206-751 8   6529 T-MOBILE USA, INC. 674   2017-05-08   
206-751 9   6529 T-MOBILE USA, INC. 674   2017-05-08   
206-752 A STTLWAWB25Z  622J SKYE TELECOM LLC DBA SKYETEL 674      
206-752 0   622J SKYE TELECOM LLC DBA SKYETEL 674   2021-05-25   
206-752 1   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 2   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 3   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 4   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 5   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 6   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 7   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 8   483E ONVOY, LLC - WA 674   2021-03-04   
206-752 9   483E ONVOY, LLC - WA 674   2021-03-04   
206-753 A STTLWA06DSE  7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 0   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 1   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 2   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 3   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 4   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 5   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 6   7455 LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 674      
206-753 7   6529 T-MOBILE USA, INC. 674   2005-06-25   
206-753 8   6529 T-MOBILE USA, INC. 674   2005-06-25   
206-753 9   6529 T-MOBILE USA, INC. 674   2005-06-25   
206-754 A RDMDWAXAPS0  4324 ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 674   2024-01-10   
206-755 A STTLWAGAAMD  5812 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 674      
206-756 A STTLWA060MD  6529 T-MOBILE USA, INC. 674      
206-756 0   006F BANDWIDTH.COM CLEC, LLC - WA 674   2021-11-19   
206-756 1   006F BANDWIDTH.COM CLEC, LLC - WA 674   2021-11-19   
206-756 2   483E ONVOY, LLC - WA 674   2021-11-19   
206-756 3   483E ONVOY, LLC - WA 674   2021-11-19   

<< 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, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.