SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zoo-duisburg.de
SSL/TLS Certificate
SSL/TLS Certificate for zoo-duisburg.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- zoo-duisburg.de
- Valid from
- Oct 12, 2026
- Valid until
- Apr 28, 2027 (170 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 8E66A9EF0BFFE78A6082245C84C6229F
- SHA-256 fingerprint
- E6:3F:06:6F:45:9E:CC:F3:4A:03:F4:31:54:49:C8:3E:12:DA:DC:D9:9A:EB:BA:2B:7D:79:B6:E3:20:2E:52:03
- 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.
This certificate has been served since Sep 29, 2026.
Never get surprised by zoo-duisburg.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zoo-duisburg.de 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.