SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
prevair.org
SSL/TLS Certificate
SSL/TLS Certificate for prevair.org
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- *.prevair.org
- Valid from
- Oct 30, 2025
- Valid until
- Oct 30, 2026 (56 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 478D7B63A7525EF9469543B1E70A302E
- SHA-256 fingerprint
- C1:BF:7A:E5:4A:C5:1D:56:1E:FF:52:5E:EB:4A:8A:78:EF:01:1F:91:E4:76:7E:F6:EF:4A:CF:2E:88:97:6D:7D
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021
Certificate Authority Authorization (CAA)
CAA restricts issuance to harica.gr; we couldn't map the serving CA (Hellenic Academic and Research Institutions CA) to one of these identifiers.
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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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