SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hu-courses.nl
SSL/TLS Certificate
SSL/TLS Certificate for hu-courses.nl
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- hu-courses.nl
- Valid from
- Oct 3, 2025
- Valid until
- Oct 3, 2026 (65 days remaining)
- Public key
- EC 256-bit
- Serial
- 393F58FF206CFF7267FEE6B805E21641
- SHA-256 fingerprint
- 38:18:F4:FE:1C:E7:A2:D5:05:36:12:B0:04:B4:C6:9A:D3:30:B1:FF:8F:BB:F1:BF:BB:1B:FC:07:3C:AA:33:44
- 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.
Never get surprised by hu-courses.nl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hu-courses.nl 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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