Certificate Transparency

See https://en.wikipedia.org/wiki/Certificate_Transparency and https://en.wikipedia.org/wiki/Online_Certificate_Status_Protocol

See https://crt.sh/ Use “%” for wildcard character. This one is pretty slow. But it does return all of the results.

See https://transparencyreport.google.com/https/certificates. This one is faster, but it returns page-by-page results.