Legacy Search Datasets

Censys products are built upon the most up-to-date and accurate map of the publicly available Internet. In Legacy Search, this information is collected and organized in two top-level datasets: hosts and certificates.

• The Legacy Search host dataset provides comprehensive information on public IPv4 and IPv6 hosts and virtual hosts (host services reached by name).
• The Censys certificates dataset is the most exhaustive collection of X.509 documents in existence. It contains over 15 billion records and grows daily as new certificates are identified on the public Internet.

Use the content in this section to learn more about the host and certificate datasets and how to navigate them.