SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hfk-bremen.de
SSL/TLS Certificate
SSL/TLS Certificate for hfk-bremen.de
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- hfk-bremen.de
- Valid from
- Sep 1, 2026
- Valid until
- Mar 19, 2027 (123 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 4DB0131799D7330496E3D5284347EAA4
- SHA-256 fingerprint
- 52:39:58:B2:D9:04:86:4D:F2:E5:A2:2B:79:FC:B3:E1:87:51:97:57:D5:3A:BB:69:A1:7B:C1:33:B0:FB:72:53
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021
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 26, 2026.
Never get surprised by hfk-bremen.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hfk-bremen.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.