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 karate-duisburg.de

Valid
Issued by (CA)
Sectigo Limited
Subject
*.karate-duisburg.de
Valid from
Jun 11, 2026
Valid until
Dec 22, 2026 (62 days remaining)
Public key
RSA 2048-bit
Serial
109DD90716578CAFCAA44E702D13E020
SHA-256 fingerprint
12:2F:6F:9F:2F:6C:9A:93:CE:03:C8:BF:78:47:02:99:32:B5:66:7B:17:59:78:4D:7B:D6:07:59:53:BF:FA:D4
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
*.karate-duisburg.de, karate-duisburg.de

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 Sep 27, 2026.

Never get surprised by karate-duisburg.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch karate-duisburg.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.