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 luett-doerp-school.de

Valid
Issued by (CA)
Sectigo Limited
Subject
luett-doerp-school.de
Valid from
Nov 11, 2025
Valid until
Dec 2, 2026 (27 days remaining)
Public key
RSA 2048-bit
Serial
20AC830EE23D5FF0A70D0AD85DBF172C
SHA-256 fingerprint
F8:F4:89:B3:61:15:D8:AC:25:BA:51:73:F5:BF:93:FC:86:ED:BA:F2:17:4D:7E:26:F0:40:09:12:D0:6D:91:26
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
luett-doerp-school.de, www.luett-doerp-school.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 Oct 9, 2026.

Never get surprised by luett-doerp-school.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch luett-doerp-school.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.