We read public Certificate Transparency logs to learn when a domain first appears, then make a small number of requests to determine whether it is live, parked, or unregistered.
A DNS lookup and one TLS handshake per domain. We do not download pages in this mode.
We honour robots.txt. To exclude us entirely:
User-agent: Awtistik Radar Disallow: /
Questions or removal requests: abuse@ this domain.