Seattle Internet Exchange (MTU 1500) - SIX Seattle

United States of America

City
Seattle
Website
https://www.seattleix.net/

About this IXP

Data last updated December 2025

Capacity at this IXP

24,904 Gbps

Cumulative port speeds of all IXP members. This shows the potential maximum traffic that can be exchanged at this IXP at one time.

Membership and capacity

The size and strength of an IXP is determined by a combination of how many members it has, and the total capacity. Larger networks tend to bring more capacity, which can benefit all members.

Data for Seattle Internet Exchange (MTU 1500) - SIX Seattle as shown in PeeringDB in December 2025

Members of this IXP

370

ASNs (autonomous system numbers) are listed in PeeringDB

In the last 12 months

  • ASNs left28
  • New ASNs joined12

Participates in the MANRS IXP program

No

IXPs that join this voluntary program apply a framework of enhanced routing security in peering. It signals an extra commitment to responsible Internet stewardship.

Source: MANRS

RIPE Atlas anchor

No

Organizations that run IXPs can host anchors to measure Internet connectivity and traffic. An anchor is a large capacity probe often used by IXPs.

Source: RIPEStat

Member information

Last sync from PeeringDB: December 2025

View this IXP on PeeringDB

Countries of registration

A summary of member registrations by country. An IXP with a mixture of international and near-neighbor members can indicate that an IXP is influential, or acts as a hub within its region or sub-region.

  • United States of America: 275
  • Canada: 36
  • United Kingdom: 12
  • Australia: 6
  • Netherlands: 5
View all countries of registration
  • Hong Kong: 4
  • South Korea: 4
  • France: 3
  • New Zealand: 2
  • Singapore: 2
  • Germany: 2
  • Switzerland: 2
  • Philippines: 2
  • Indonesia: 2
  • Japan: 2
  • Israel: 1
  • Taiwan: 1
  • Luxembourg: 1
  • Estonia: 1
  • Belgium: 1
  • Romania: 1
  • Guam: 1
  • South Africa: 1
  • China: 1
  • Czechia: 1
  • Sweden: 1

Types of network at this IXP

The mix of members is an indication of a strength or focus of an IXP.

  • NSP: 102
  • Cable/DSL/ISP: 98
  • Content: 74
  • Unknown: 32
  • Educational/Research: 26
View all network types
  • Enterprise: 15
  • Non-Profit: 11
  • Network Services: 9
  • Government: 2
  • Route Server: 1

Members peering at the route server

264 / 370

The route server is a central hub that makes it easier for all networks to peer without having to create individual agreements with other members.

Members using RPKI

297 / 370

members at this IXP use Resource Public Key Infrastructure (RPKI), a security measure that helps ensure traffic is routed correctly. A member is counted as using RPKI if they have at least one valid ROA.

Peering policies of IXP members

Members of an IXP can choose how they peer with others. The Internet Society encourages open policies where possible.

Member list for Seattle Internet Exchange (MTU 1500) - SIX Seattle

This list uses the data available in PeeringDB, which is based on self-reported data, and was last updated in Pulse December 2025

Name AS Number Peering policy RPKI Enabled
SpaceX Starlink
  • Autonomous system (AS) number: 14593
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Open
  • Port speed: 800 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 66
 14593 Open Yes
Spartan Host Ltd
  • Autonomous system (AS) number: 50131
  • Type of AS:
  • Peering policy: Unknown
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United Kingdom
  • Total peering locations for this AS: 1
 50131 Unknown Yes
Sprint - AS1239
  • Autonomous system (AS) number: 1239
  • Type of AS: NSP
  • Peering policy: Unknown
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 3
 1239 Unknown No
Stargate Connections Inc.
  • Autonomous system (AS) number: 19171
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Canada
  • Total peering locations for this AS: 3
 19171 Unknown Yes
StarTouch, Inc.
  • Autonomous system (AS) number: 15177
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 20 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 1
 15177 Unknown Yes
State of Oregon
  • Autonomous system (AS) number: 1798
  • Type of AS: Non-Profit
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 2
 1798 Unknown Yes
Stellar Association
  • Autonomous system (AS) number: 36374
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Open
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 3
 36374 Open Yes
SUMOFIBER
  • Autonomous system (AS) number: 4226
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 7
 4226 Unknown Yes
SupraNet Communications
  • Autonomous system (AS) number: 4150
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 7
 4150 Unknown Yes
Swisscom
  • Autonomous system (AS) number: 3303
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 1 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Switzerland
  • Total peering locations for this AS: 63
 3303 Unknown Yes
Swoop
  • Autonomous system (AS) number: 58511
  • Type of AS: NSP
  • Peering policy: Open
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Australia
  • Total peering locations for this AS: 29
 58511 Open Yes
Syringa Networks
  • Autonomous system (AS) number: 15305
  • Type of AS: NSP
  • Peering policy: Open
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 13
 15305 Open Yes
TCT West, Inc.
  • Autonomous system (AS) number: 4474
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 200 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 4
 4474 Unknown Yes
TDS Telecom
  • Autonomous system (AS) number: 4181
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 9
 4181 Unknown Yes
Tech Futures Interactive Inc.
  • Autonomous system (AS) number: 394256
  • Type of AS: NSP
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Canada
  • Total peering locations for this AS: 6
 394256 Unknown Yes
TekSavvy Solutions Inc.
  • Autonomous system (AS) number: 5645
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 20 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: Canada
  • Total peering locations for this AS: 10
 5645 Unknown Yes
Telebyte NW
  • Autonomous system (AS) number: 13871
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 1 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 1
 13871 Unknown No
Telekomunikasi Indonesia Int (TELIN)
  • Autonomous system (AS) number: 7713
  • Type of AS: NSP
  • Peering policy: Restrictive
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Indonesia
  • Total peering locations for this AS: 36
 7713 Restrictive Yes
TELUS Communications
  • Autonomous system (AS) number: 852
  • Type of AS: NSP
  • Peering policy: Unknown
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: Canada
  • Total peering locations for this AS: 7
 852 Unknown Yes
TeraGo Networks Inc.
  • Autonomous system (AS) number: 20161
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 20 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Canada
  • Total peering locations for this AS: 2
 20161 Unknown No
Teraswitch Inc
  • Autonomous system (AS) number: 20326
  • Type of AS: NSP
  • Peering policy: Unknown
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 21
 20326 Unknown Yes
Thales/Imperva
  • Autonomous system (AS) number: 19551
  • Type of AS: Content
  • Peering policy: Open
  • Port speed: 40 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 77
 19551 Open Yes
The Constant Company
  • Autonomous system (AS) number: 20473
  • Type of AS: NSP
  • Peering policy: Selective
  • Port speed: 100 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 56
 20473 Selective Yes
Threshold Communications
  • Autonomous system (AS) number: 7752
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 20 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 1
 7752 Unknown Yes
Tianhai Global Network
  • Autonomous system (AS) number: 4842
  • Type of AS:
  • Peering policy: Unknown
  • Port speed: 1 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: China
  • Total peering locations for this AS: 6
 4842 Unknown Yes