SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kncom.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for kncom.co.kr
Expired- Issued by (CA)
- ZeroSSL
- Subject
- kncom.co.kr
- Valid from
- Apr 16, 2025
- Valid until
- Jul 15, 2025 (expired 476 days ago)
- Public key
- RSA 2048-bit
- Serial
- 040F8665B59273E0BE32545987CE9B44
- SHA-256 fingerprint
- D3:B0:DC:30:3E:9B:A5:6B:84:93:85:1D:D1:59:B1:3A:38:33:C7:8A:D2:17:53:C1:D0:65:76:F5:11:80:E2:96
- Chain
- ZeroSSL RSA Domain Secure Site CA → USERTrust RSA Certification Authority
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, CNAME, TXT 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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