SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sea-eu.org
SSL/TLS Certificate
SSL/TLS Certificate for sea-eu.org
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- sea-eu.org
- Valid from
- Mar 11, 2026
- Valid until
- Mar 11, 2027 (206 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 27202A1C3ACBEB5D82683AACFBCDFCDA
- SHA-256 fingerprint
- B6:63:75:49:30:D7:90:3F:7A:9A:E5:98:AE:47:EB:84:3A:D9:72:6A:B4:9A:ED:57:52:72:85:BF:39:73:68:49
- 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 digicert.com, harica.gr, 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 Aug 6, 2026.
Never get surprised by sea-eu.org's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sea-eu.org 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.