Below are a series of example queries:

Unnamed, unexpired (as of Jan. 1, 2022) certificates seen in a Censys scan:

Certificates

Self-signed certificates discovered in a Censys scan:

Certificates

Certificates issued by Let's Encrypt for censys.io:

Certificates

Certificates issued by Digicert for the purpose of certificate signing:

Certificates

Mozilla NSS trusted intermediate CAs:

Certificates

Certificates whose trust has been revoked by Google that have ever been seen in a Censys scan:

Certificates

Browser-trusted certificates for Github.com:

Certificates