SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
uni-passau.de
SSL/TLS Certificate
SSL/TLS Certificate for uni-passau.de
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- uni-passau.de
- Valid from
- Feb 16, 2026
- Valid until
- Feb 16, 2027 (167 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 374F5379074D5A8C359A8F56F58181E7
- SHA-256 fingerprint
- DC:39:5A:53:0A:9B:40:9E:5F:30:60:9F:E8:ED:E0:A6:F9:F5:EC:8C:F1:8E:3D:38:DA:E7:04:B7:4F:DD:A9:ED
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021
Certificate Authority Authorization (CAA)
CAA restricts issuance to harica.gr, letsencrypt.org, pki.dfn.de, sectigo.com; we couldn't map the serving CA (Hellenic Academic and Research Institutions CA) to one of these identifiers.
Never get surprised by uni-passau.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch uni-passau.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, 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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