Infrastructure fingerprints

Where each site is hosted and served — hosting network/ASN, CDN, nameservers, registrar, TLS issuer — and how that changes over time.

How it’s collected

Collected from public RDAP/WHOIS, DNS, and TLS certificate data, with a change-triggered history so host and CDN migrations are dated.

Known limits

• A CDN in front of a site masks the true origin host.
• Shared hosting infrastructure does not imply shared ownership on its own.

See it in use: Hosting. Found an error? How we handle corrections.

Every figure in this dataset is drawn from the source above and dated. This is measured, first-party data — where a number is an estimate it is labelled as one. This site is in development.