SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
asco.or.kr
SSL/TLS Certificate
SSL/TLS Certificate for asco.or.kr
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.asco.or.kr
- Valid from
- Apr 13, 2026
- Valid until
- Oct 29, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 603F4CF6AA55174250CF07E9
- SHA-256 fingerprint
- F5:99:03:32:12:7A:44:FE:C2:30:A7:53:14:F6:95:8B:A2:B9:32:C4:F0:3D:C0:F6:70:25:B1:A1:72:41:48:20
- Chain
- GlobalSign GCC R6 AlphaSSL CA 2025 → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Jul 29, 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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