Certificate Transparency Lookup
Search Certificate Transparency logs for SSL/TLS certificates and subdomains
What Certificate Transparency Lookup does
Certificate Transparency Lookup is a security tool that searches public Certificate Transparency logs to verify SSL/TLS certificates and subdomains for any specified domain. Users receive a detailed record of when and where a certificate was publicly issued, including the issuing Certificate Authority, validity dates, and the complete list of domain names covered by the certificate's Subject Alternative Name field. This provides a transparent audit trail of certificate issuance, allowing domain owners and security professionals to detect unauthorized certificates or mis-issued SSL/TLS certificates that could indicate security risks or phishing attempts.
How to use the Inventive HQ Certificate Transparency Lookup
- 1
Enter the full domain name or subdomain you want to investigate into the search field
- 2
Submit the query to search multiple global Certificate Transparency log sources
- 3
Review the compiled metadata displayed, including issuance timestamps, Certificate Authority details, and the full Subject Alternative Name list
- 4
Use the results to verify legitimate certificate issuance or identify potentially unauthorized certificates for the domain
Best for
Security professionals, domain owners, and privacy-conscious individuals who need to verify SSL/TLS certificate legitimacy and monitor for unauthorized certificate issuance across global logs.
Limitations
- Results depend on the completeness and update frequency of public Certificate Transparency logs
- May not capture certificates issued before logs were publicly indexed or from non-participating CAs
- Information displayed is technical metadata and may require familiarity with certificate structures to interpret fully
Certificate Transparency Lookup FAQ
- Can this tool find certificates for any domain on the internet?
- It searches public Certificate Transparency logs, so it can find certificates for domains that have been logged with participating Certificate Authorities. Coverage depends on whether the CA submits certificates to public logs.
- What does the Subject Alternative Name field show?
- The Subject Alternative Name field displays all domain names, subdomains, and IP addresses covered by the certificate, which helps verify if a certificate matches the intended website or reveals unexpected additions.
- How recent are the certificate records shown?
- Records appear once a Certificate Authority publicly submits the certificate to a transparency log, so the most recently issued or renewed certificates will have the latest entry timestamps.
- Can this tool detect if a certificate has been revoked?
- The tool shows certificate issuance records from transparency logs; revocation status is not displayed, but finding an unexpected certificate issuance date can indicate a potential security concern.