SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zero-base.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for zero-base.co.kr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- zero-base.co.kr
- Valid from
- Aug 20, 2026
- Valid until
- Nov 18, 2026 (51 days remaining)
- Public key
- EC 256-bit
- Serial
- 06FA30F0D21972AD8481C598622DF267FB07
- SHA-256 fingerprint
- 66:C9:B3:BF:27:68:C8:38:3D:8C:38:46:20:F4:1E:A3:E1:AF:FC:47:16:EE:30:B2:6B:CE:87:A0:5D:7C:8E:1B
- Chain
- YE1 → 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.
Never get surprised by zero-base.co.kr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zero-base.co.kr continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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