SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hfg-offenbach.de
SSL/TLS Certificate
SSL/TLS Certificate for hfg-offenbach.de
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- hfg-offenbach.de
- Valid from
- Jul 23, 2026
- Valid until
- Feb 7, 2027 (87 days remaining)
- Public key
- EC 256-bit
- Serial
- 3986A0D7136C62E9E314A2B37939E171
- SHA-256 fingerprint
- 86:E1:82:60:E8:49:BF:61:44:5A:31:A5:B6:33:40:48:AF:99:A9:F1:00:B9:3B:62:6A:1D:0A:52:08:19:0F:A2
- Chain
- GEANT TLS ECC 1 → HARICA TLS ECC Root CA 2021 → Hellenic Academic and Research Institutions ECC RootCA 2015
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 Aug 15, 2026.
Never get surprised by hfg-offenbach.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hfg-offenbach.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.