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 har.tl

Hostname mismatch
Issued by (CA)
Hellenic Academic and Research Institutions CA
Subject
sso.bev.gv.at
Valid from
Oct 15, 2025
Valid until
Oct 15, 2026 (27 days remaining)
Public key
RSA 2048-bit
Serial
3967A692098B07406CEF3A9D0D97C454
SHA-256 fingerprint
61:CD:2D:F0:53:2F:33:88:E8:D0:92:EF:EF:06:33:60:FF:5A:93:11:95:3D:CF:1A:DF:2D:A7:EF:F1:01:E0:4E
Chain
GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021 → Hellenic Academic and Research Institutions RootCA 2015
Subject Alternative Names (1)
sso.bev.gv.at

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 Aug 31, 2026.

Never get surprised by har.tl's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch har.tl 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.