Participants

This is the non-JavaScript participants page. While current, the new format and style is here.

This table is also available in these formats: [ CSV | Euro-IX JSON | PCH | SIX JSON | TSV ]

Some data is from PeeringDB.com and is updated hourly. Please keep your record there current.

The Resource Public Key Infrastructure (RPKI) data is updated hourly.

The Internet Routing Registry data may be an hour or two old. The order of the counts is: IPv4 prefixes, IPv6 prefixes, IPv4 as-set ASNs, IPv6 as-set ASNs, IPv4 as-set prefixes, IPv6 as-set prefixes. Send an e-mail to info_a_t_seattleix.net if changes to your PeeringDB "IRR Record" are not having the desired effect, as some special case handling to derive the as-set name is being performed. The preferred format for PeeringDB "IRR Record" is simply your as-set name.

The prefix counts from the route servers may be a minute or two old. For each route server, the order of the counts is: 1500 MTU IPv4, 1500 MTU IPv6, 9000 MTU IPv4, 9000 MTU IPv6.

If there are any route server errors resulting in drops, the per instance count and a link to the data is included. 'err' details are for errors the route server adjacent peer is responsible for, while 'xerr' details are for errors downstream (transited) ASNs are responsible for. The error files listing dropped prefixes are reset daily UTC. Clicking the err# or xerr# will present a route server drops page focused on a specific ASN, thus enabling deeper analysis.

Corrections to webmaster_a_t_seattleix.net.

There are 365 autonomous systems / 431 routers connected to the SIX. The voting membership count is 360.

This table is current as of Mon Mar 9 10:27:01 2026 UTC.