SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hu-berlin.de
SSL/TLS Certificate
SSL/TLS Certificate for hu-berlin.de
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- hu-berlin.de
- Valid from
- Jul 22, 2026
- Valid until
- Feb 6, 2027 (183 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 11801363FFB7209C2D5AE4038CF9C724
- SHA-256 fingerprint
- 0E:7C:FB:2F:3C:F2:B2:9B:40:CD:09:50:D2:50:63:37:BF:43:6F:3F:12:0F:24:7B:1E:E5:27:CB:78:7D:F4:FC
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021 → Hellenic Academic and Research Institutions RootCA 2015
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by hu-berlin.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hu-berlin.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.