IPv6 Subnet-Router anycast dataset: IPv6 router addresses

This page presents details of the IPv6 router addresses discovered using Subnet-Router anycast (SRA) probing. We provide insights into changes over time, geographic distribution of IPv6 router addresses, and the types of networks connecting these router addresses.

We also provide background on our measurement method.

IPv6 router addresses

This graph shows the development of active IPv6 router addresses observed with SRA probing over time.

Global distribution of IPv6 router addresses observed with SRA probing

This world-map shows the geographic distribution of active IPv6 router addresses per country.

Comparison of network types across IPv6 address data sources

This heatmap shows the distribution of IPv6 addresses belonging to a specific network type (e.g., ISPs, CDNs) for multiple IPv6 address data sets, including our SRA results.

SRA candidate set generation pipeline

This diagram illustrates the process to generate target IPv6 addresses for SRA scanning. We base the generation of target addresses on two external data sources, the TU Munich hitlist and public RouteViews BGP dumps.

For each hitlist address, we derive the /64 network. For each entry in the BGP table dump, we consider all /48 prefixes further to generate all possible /64 SRA addresses.

Generation of Subnet-Router anycast addresses

This diagram illustrates how we generate the Subnet-Router anycast (SRA) addresses for a given IPv6 subnet. For the given input prefixes, we generate all possible /64 subnets. Then, for each subnet, we derive the SRA address by setting the interface identifier to the fixed value of ::0.

More details on the method

Download our paper