SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
shop-yellowduck.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for shop-yellowduck.co.kr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- shop-yellowduck.co.kr
- Valid from
- Oct 6, 2026
- Valid until
- Jan 4, 2027 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05794845B82AA759090AC52F17402174518C
- SHA-256 fingerprint
- F9:7A:98:D8:1E:56:3A:24:45:39:BB:4C:09:C5:64:F9:C6:2F:C0:1F:2B:F5:ED:6C:5F:C7:4E:14:7E:55:E3:47
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 8, 2026.
Never get surprised by shop-yellowduck.co.kr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch shop-yellowduck.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, 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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