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 cathlab-2-go.de

Hostname mismatch
Issued by (CA)
GlobalSign nv-sa
Subject
*.dgk.org
Valid from
Sep 17, 2026
Valid until
Apr 4, 2027 (163 days remaining)
Public key
RSA 2048-bit
Serial
653D2E32F7B2F29A75AD1BA4
SHA-256 fingerprint
56:5D:E1:65:3A:D2:81:23:AE:51:81:2E:52:5B:5E:AC:45:89:03:5F:5D:CA:AC:D7:00:39:C0:CD:66:F1:05:08
Chain
GlobalSign GCC R46 AlphaSSL CA 2025 → GlobalSign Root R46
Subject Alternative Names (2)
*.dgk.org, dgk.org

Certificate Authority Authorization (CAA)

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

We've observed 1 previous certificate for this host. This certificate has been served since Oct 19, 2026.

Never get surprised by cathlab-2-go.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch cathlab-2-go.de 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.