Seattle Internet Exchange (MTU 1500) - SIX Seattle

United States of America

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

About this IXP

Data last updated April 2026

Capacity at this IXP

26,735 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 April 2026

Members of this IXP

368

ASNs (autonomous system numbers) are listed in PeeringDB

In the last 12 months

ASNs left25
New ASNs joined18

Participates in the MANRS IXP program

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

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: April 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: 272
Canada: 36
United Kingdom: 10
Australia: 6
Netherlands: 5

View all countries of registration

Hong Kong: 4
South Korea: 4
France: 3
Singapore: 3
Indonesia: 2
New Zealand: 2
Germany: 2
Switzerland: 2
Japan: 2
Philippines: 2
Luxembourg: 1
Estonia: 1
Isle of Man: 1
South Africa: 1
Israel: 1
Seychelles: 1
Guam: 1
Saudi Arabia: 1
China: 1
Czechia: 1
Sweden: 1
Belgium: 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: 103
Cable/DSL/ISP: 98
Content: 72
Unknown: 31
Educational/Research: 26

View all network types

Enterprise: 16
Non-Profit: 10
Network Services: 9
Government: 2
Route Server: 1

Members peering at the route server

263 / 368

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 / 368

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 April 2026

Name	AS Number	Peering policy	RPKI Enabled
Blue Origin Autonomous system (AS) number: 55244 Type of AS: 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: 6	55244	Unknown	Yes
Broadband Visions Autonomous system (AS) number: 25615 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	25615	Unknown	Yes
BSO Autonomous system (AS) number: 4455 Type of AS: NSP Peering policy: Unknown Port speed: 1 Gbps Does this member peer at the route server?: Yes Country of registration: United Kingdom Total peering locations for this AS: 37	4455	Unknown	Yes
Bungie Autonomous system (AS) number: 394073 Type of AS: Content Peering policy: Unknown Port speed: 200 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 1	394073	Unknown	No
ByteDance Autonomous system (AS) number: 396986 Type of AS: Content Peering policy: Selective Port speed: 200 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 92	396986	Selective	Yes
Bytefilter LLC Autonomous system (AS) number: 1002 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: 4	1002	Unknown	Yes
CABLE ONE Autonomous system (AS) number: 11492 Type of AS: Cable/DSL/ISP Peering policy: Selective Port speed: 400 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 2	11492	Selective	Yes
CacheFly Autonomous system (AS) number: 30081 Type of AS: Content Peering policy: Open 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: 41	30081	Open	Yes
Cactus International Autonomous system (AS) number: 398700 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: 1	398700	Unknown	Yes
campuscolo.com Autonomous system (AS) number: 17017 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: 1	17017	Unknown	Yes
CANARIE Inc Autonomous system (AS) number: 6509 Type of AS: Educational/Research 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: 9	6509	Unknown	Yes
CarverLink Autonomous system (AS) number: 55216 Type of AS: Government 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	55216	Unknown	Yes
Cato Networks Autonomous system (AS) number: 13150 Type of AS: Peering policy: Open Port speed: 100 Gbps Does this member peer at the route server?: Yes Country of registration: Israel Total peering locations for this AS: 77	13150	Open	Yes
CDN77 Autonomous system (AS) number: 60068 Type of AS: Content Peering policy: Open Port speed: 100 Gbps Does this member peer at the route server?: Yes Country of registration: United Kingdom Total peering locations for this AS: 58	60068	Open	Yes
Charter Communications Autonomous system (AS) number: 20115 Type of AS: Cable/DSL/ISP Peering policy: Selective Port speed: 200 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 14	20115	Selective	Yes
China Mobile International Autonomous system (AS) number: 58453 Type of AS: NSP Peering policy: Restrictive Port speed: 100 Gbps Does this member peer at the route server?: No Country of registration: Hong Kong Total peering locations for this AS: 21	58453	Restrictive	Yes
Cisco Umbrella Autonomous system (AS) number: 36692 Type of AS: Content 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: 52	36692	Unknown	Yes
City of Seattle - IIT Autonomous system (AS) number: 3401 Type of AS: Enterprise 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	3401	Unknown	No
City West Cable & Telephone Autonomous system (AS) number: 18988 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: Canada Total peering locations for this AS: 3	18988	Unknown	No
Clackamas ESD Autonomous system (AS) number: 36416 Type of AS: Educational/Research Peering policy: Open Port speed: 20 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 2	36416	Open	No
Clearfly Communications Autonomous system (AS) number: 27400 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: 2	27400	Unknown	Yes
Cloudflare Autonomous system (AS) number: 13335 Type of AS: Content 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: 349	13335	Open	Yes
CnServer LLC Autonomous system (AS) number: 7488 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: 3	7488	Open	Yes
Cofractal Autonomous system (AS) number: 26073 Type of AS: Peering policy: Open 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: 7	26073	Open	Yes
Collier Technologies Autonomous system (AS) number: 25819 Type of AS: NSP 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	25819	Unknown	Yes
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