SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zendo-koeln.de
SSL/TLS Certificate
SSL/TLS Certificate for zendo-koeln.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.zendo-koeln.de
- Valid from
- Jun 7, 2026
- Valid until
- Dec 18, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- ECDFBD38DA9F75A9CD99BB1497273D02
- SHA-256 fingerprint
- 82:C6:72:29:4A:D2:8D:3F:E6:62:6D:30:EB:81:90:EA:23:D2:BF:D6:F6:98:CC:20:19:03:D2:29:62:1D:18:A2
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → 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, 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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