SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sungho-lee.kr
SSL/TLS Certificate
SSL/TLS Certificate for sungho-lee.kr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sungho-lee.kr
- Valid from
- Jul 17, 2026
- Valid until
- Oct 15, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 051D8F434C32D8072FBC4FF927F9AD7BC190
- SHA-256 fingerprint
- 7D:E6:EC:26:07:6D:19:FA:DA:04:F3:45:DB:D4:92:7A:8C:7F:A1:BC:E5:9C:6D:8D:65:DD:7F:40:99:12:75:44
- 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.
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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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