Seattle Internet Exchange (MTU 1500) - SIX Seattle

United States of America

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

About this IXP

Data last updated May 2026

Capacity at this IXP

28,265 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 May 2026

Members of this IXP

371

ASNs (autonomous system numbers) are listed in PeeringDB

In the last 12 months

  • ASNs left22
  • New ASNs joined23

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: May 2026

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: 9
  • Australia: 6
  • Hong Kong: 5
View all countries of registration
  • Netherlands: 5
  • South Korea: 4
  • France: 3
  • Singapore: 3
  • Indonesia: 2
  • Switzerland: 2
  • New Zealand: 2
  • Germany: 2
  • Japan: 2
  • Philippines: 2
  • Luxembourg: 1
  • Isle of Man: 1
  • South Africa: 1
  • Israel: 1
  • Saudi Arabia: 1
  • Belgium: 1
  • Estonia: 1
  • Guam: 1
  • China: 1
  • Czechia: 1
  • Sweden: 1
  • Seychelles: 1
  • Taiwan: 1

Types of network at this IXP

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

  • NSP: 106
  • Cable/DSL/ISP: 98
  • Content: 71
  • Unknown: 32
  • Educational/Research: 25
View all network types
  • Enterprise: 16
  • Non-Profit: 11
  • Network Services: 9
  • Government: 2
  • Route Server: 1

Members peering at the route server

266 / 371

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

301 / 371

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 May 2026

Name AS Number Peering policy RPKI Enabled
Link Oregon
  • Autonomous system (AS) number: 3701
  • Type of AS: Educational/Research
  • 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: 4
 3701 Selective No
Longmont Power & Communications
  • Autonomous system (AS) number: 393552
  • 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: 2
 393552 Unknown Yes
MCKAYCOM
  • Autonomous system (AS) number: 50763
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Open
  • Port speed: 1 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: Isle of Man
  • Total peering locations for this AS: 4
 50763 Open Yes
MCSnet
  • Autonomous system (AS) number: 36817
  • 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: Canada
  • Total peering locations for this AS: 3
 36817 Unknown No
MDNET
  • Autonomous system (AS) number: 40138
  • Type of AS: Network Services
  • 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: 4
 40138 Unknown Yes
MIDnet
  • Autonomous system (AS) number: 16970
  • Type of AS:
  • Peering policy: Open
  • 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: 8
 16970 Open Yes
MIXBOOST
  • Autonomous system (AS) number: 401922
  • Type of AS:
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 1
 401922 Unknown Yes
Macarne - AS64289
  • Autonomous system (AS) number: 64289
  • Type of AS: NSP
  • 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: 24
 64289 Unknown Yes
Matanuska Telecom Association
  • Autonomous system (AS) number: 11090
  • 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: 4
 11090 Unknown Yes
Matrix Cable International Exchange (MCIX)
  • Autonomous system (AS) number: 55818
  • Type of AS: Network Services
  • Peering policy: Selective
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: Indonesia
  • Total peering locations for this AS: 16
 55818 Selective Yes
Megaport Global Access
  • Autonomous system (AS) number: 49915
  • Type of AS: NSP
  • 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: 23
 49915 Unknown Yes
Mercury NZ
  • Autonomous system (AS) number: 55850
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Open
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: New Zealand
  • Total peering locations for this AS: 19
 55850 Open Yes
Meta
  • Autonomous system (AS) number: 32934
  • Type of AS: Content
  • Peering policy: Selective
  • Port speed: 400 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 204
 32934 Selective Yes
Metapeer
  • Autonomous system (AS) number: 13331
  • Type of AS: Content
  • 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
 13331 Unknown Yes
Microsoft
  • Autonomous system (AS) number: 8075
  • Type of AS: Content
  • Peering policy: Selective
  • Port speed: 400 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 192
 8075 Selective Yes
Mid-Rivers Telephone Cooperative
  • Autonomous system (AS) number: 11961
  • Type of AS:
  • Peering policy: Selective
  • 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: 3
 11961 Selective Yes
Minnesota Brain Injury Alliance
  • Autonomous system (AS) number: 19418
  • Type of AS: Non-Profit
  • Peering policy: Unknown
  • Port speed: 1 Gbps
  • Does this member peer at the route server?: Yes
  • Country of registration: United States of America
  • Total peering locations for this AS: 2
 19418 Unknown No
Minnesota VoIP
  • Autonomous system (AS) number: 32621
  • Type of AS: Content
  • 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: 9
 32621 Unknown Yes
Misaka.io
  • Autonomous system (AS) number: 917
  • Type of AS: NSP
  • Peering policy: Open
  • 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: 21
 917 Open Yes
Montana Internet Corporation
  • Autonomous system (AS) number: 4043
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 1
 4043 Unknown No
Montana Opticom AS11924
  • Autonomous system (AS) number: 11924
  • Type of AS: Cable/DSL/ISP
  • Peering policy: Unknown
  • Port speed: 30 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 2
 11924 Unknown Yes
Montana West LLC
  • Autonomous system (AS) number: 54327
  • Type of AS: NSP
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 1
 54327 Unknown No
Moody's
  • Autonomous system (AS) number: 17350
  • Type of AS: Enterprise
  • Peering policy: Unknown
  • Port speed: 10 Gbps
  • Does this member peer at the route server?: No
  • Country of registration: United States of America
  • Total peering locations for this AS: 13
 17350 Unknown Yes
Mouat's Technology Services, Inc.
  • Autonomous system (AS) number: 3601
  • Type of AS: Content
  • 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: 1
 3601 Unknown No
Mountain West Technologies AS10947
  • Autonomous system (AS) number: 10947
  • 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: 3
 10947 Unknown Yes