IPv6 Subnet-Router Anycast (SRA) Dataset
This website provides the IPv6 SRA dataset, a collection of IPv6 router addresses discovered using Subnet-Router Anycast (SRA) probing. In addition to a weekly updated dataset, we offer a dashboard that compares our dataset with other well-known IPv6 address datasets such as the TUM Hitlist. We also provide information about routing loops on the IPv6 Internet to help avoid collateral damage during scanning.
140M
Observed IPv6 router addresses using subnet-router anycast probing
16k
Autonomous systems connect routers from the SRA datasets
Last scan: 2026-05-27
Additional IPv6 router addresses compared to other data sources
IPv6 router addresses replying to a direct ICMP Echo request (ping)
Column schema for .csv.zst
# IPv6 router addresses, scanned on YYYY-MM-DD router_address string ping_success bool
Column schema for .parquet
router_address string ping_success bool scan_date date
Comparison with other IPv6 address sources
TU Munich Hitlist
Latest dataset from: 2026-05-23 SRA dataset from: 2026-05-27
IPv6 Addresses
Total
40M
Overlap with SRA
Autonomous Systems
Total
22k
Overlap with SRA
CAIDA ITDK
Latest dataset from: 2026-05-28 SRA dataset from: 2026-05-27
IPv6 Addresses
Total
39M
Overlap with SRA
Autonomous Systems
Total
34k
Overlap with SRA
RIPE Atlas
Latest dataset from: 2026-05-26 SRA dataset from: 2026-05-27
IPv6 Addresses
Total
167k
Overlap with SRA
Autonomous Systems
Total
13k
Overlap with SRA
We analyze known issues in IPv6: Routing loops and amplification.
If you use our data, please use the following reference:
@article{khnsw-siius-25,
author = {Maynard Koch and Raphael Hiesgen and Marcin Nawrocki and Thomas C. Schmidt and Matthias W{\"a}hlisch},
title = {{Scanning the IPv6 Internet Using Subnet-Router Anycast Probing}},
journal = {Proceedings of the ACM on Networking (PACMNET)},
pages = {50:1-50:15},
volume = {3},
number = {CoNEXT4},
year = {2025},
month = {December},
publisher = {ACM},
address = {New York},
url = {https://doi.org/10.1145/3768997},
}Powered by
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