SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
seo-ha.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for seo-ha.co.kr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- seo-ha.co.kr
- Valid from
- Sep 19, 2026
- Valid until
- Dec 18, 2026 (76 days remaining)
- Public key
- EC 256-bit
- Serial
- 060E22BA0B8D5B462DBD90603F0E11409377
- SHA-256 fingerprint
- D5:D1:B1:E9:AA:1C:0A:38:A2:9C:45:8B:67:7D:B6:89:69:4F:EE:F1:C1:74:DF:0C:66:B6:04:38:43:21:3F:15
- Chain
- YE2 → Root YE → ISRG Root X2 → 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 Sep 24, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
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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