SSL Certificate Transparency Log Search

Search CT logs for issued certificates and discover subdomains

Searching CT logs for ...

Certificates Found

Subdomains Found

Discovered Subdomains

Certificate History

Common Name	Issuer	Valid From	Valid To

Error

About CT Log Search

Our free CT Log Search queries Certificate Transparency logs to find all SSL certificates ever issued for a domain. Search by domain name to discover certificate history, identify unauthorized issuers, and monitor for certificate mis-issuance.

How to Use

1Enter the domain name to search.
2Click "Search CT Logs" to query Certificate Transparency databases.
3Review the list of certificates found with issuer, dates, and SANs.

Use Cases

•Monitor certificate issuance for your domains
•Detect unauthorized certificate issuance
•Verify CA compliance with CT requirements
•Security incident investigation

Technical Details

Data Sources

CT log aggregators
All publicly logged certificates

Certificate Data

Issuer, SANs, timestamps
Full certificate chain information

Tips & Best Practices

•Monitor your domains regularly for unauthorized certificate issuance
•Set up alerts for new certificates on your domains
•Use CT logs to verify CA compliance with CT requirements

Frequently Asked Questions

Certificate Transparency logs are public records of all SSL certificates issued by CAs, enabling detection of unauthorized certificates.

Yes, CT logs include historical certificate data including expired certificates.

CT logs are updated in near real-time as certificates are issued.

Video Tutorial

Video tutorial coming soon