SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
mark-lab.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for mark-lab.co.kr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- mark-lab.co.kr
- Valid from
- Oct 14, 2026
- Valid until
- Jan 12, 2027 (63 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06DF968EDD3C545BE20FFC3EE3AA65FDAAF5
- SHA-256 fingerprint
- 6E:30:2F:DA:B4:5B:C9:51:94:21:3C:10:1F:7A:A7:D2:50:F3:5B:E8:FC:CA:AC:6B:A0:DA:53:8A:D7:CE:C4:32
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 27, 2026.
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Uptime
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DNS changes
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TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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