SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for orca.nrw
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- www.orca.nrw
- Valid from
- Nov 18, 2025
- Valid until
- Nov 18, 2026 (43 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 726216534BCC6E2A0463A30A8F56CB01
- SHA-256 fingerprint
- 38:1B:2B:4E:AF:34:6D:49:18:65:D1:6E:22:45:76:4F:65:82:DC:E5:00:98:BC:E7:26:C4:8E:46:A0:9B:17:CC
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021 → Hellenic Academic and Research Institutions RootCA 2015
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.
This certificate has been served since Jul 31, 2026.
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Uptime
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DNS changes
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TLS certificate
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