SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for sgcg.kr
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- sgcg.kr
- Valid from
- Nov 5, 2024
- Valid until
- Nov 10, 2025 (expired 280 days ago)
- Public key
- RSA 2048-bit
- Serial
- A4D41F70BC2D8DC39B9B14E0B66815C0
- SHA-256 fingerprint
- 59:93:74:87:14:F8:9B:F2:3B:FA:63:7E:B3:6F:99:74:BA:5C:35:6C:75:5C:44:CF:3C:26:CD:51:8C:CA:79:C0
- Chain
- Sectigo RSA Domain Validation Secure Server CA → USERTrust RSA Certification Authority → AAA Certificate Services
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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