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 ataxia-study-group.net

Expired
Issued by (CA)
Let's Encrypt
Subject
*.capnetz.de
Valid from
Apr 1, 2026
Valid until
Jun 30, 2026 (expired 30 days ago)
Public key
RSA 2048-bit
Serial
0589DEEFABA635F77449D58382DDCA042486
SHA-256 fingerprint
47:62:2F:9F:06:36:46:8D:DC:2D:C5:6D:4C:C9:D0:A7:97:73:5F:6A:BE:78:6F:75:CE:64:59:CC:12:32:03:CE
Chain
R12 → ISRG Root X1
Subject Alternative Names (1)
*.capnetz.de

Certificate Authority Authorization (CAA)

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

Never get surprised by ataxia-study-group.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ataxia-study-group.net 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.