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 tis-graz.at

Valid
Issued by (CA)
Let's Encrypt
Subject
tis-graz.at
Valid from
Oct 20, 2026
Valid until
Jan 18, 2027 (77 days remaining)
Public key
EC 256-bit
Serial
0680CB6FA35E09FAF7F3EBECD4B21CC0415B
SHA-256 fingerprint
E8:9D:CF:0D:F4:48:1D:48:38:63:1B:56:30:17:42:84:41:6C:E1:E9:5D:CB:DD:75:CB:D7:64:80:27:37:04:C2
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
*.tis-graz.at, tis-graz.at

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by tis-graz.at's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch tis-graz.at continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.