How do bgp.tools rankings work?

Adjacency / Peering

This measures how many peers a ASN has, IPv4 and IPv6 peerings are mixed together.

Networks that bgp.tools does not have a direct or indirect table view of will naturally score lower on this since bgp.tools cannot see what peerings they have. To fix that they can setup BGP sessions to bgp.tools

AS Cone

This measures how many total ASNs are downstream of the network. This includes downstreams of downstreams. This can help capture the total tree of networks behind another.

Estimated Eyeball

This ranks networks based on a estimation of their real world web browsing user count. As this is just a estimation, it should be only taken as such.

Unique Domains Hosted

This ranks networks based on how many Unique Domains point to prefixes originated by that network. This includes a rounding operation that prevents a single domains subdomains inflating this number. (IE, v4.bgp.tools and v6.bgp.tools is only counted once as bgp.tools)

IPv4 and IPv6 Space Originated

These two ranks are based around how much aggergate IPv4 and IPv6 space is originated by each ASN. These entries are de-duplicated so that overlapping announcements are not double counted.