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 lui-tech.de

Valid
Issued by (CA)
Let's Encrypt
Subject
lui-tech.de
Valid from
Sep 14, 2026
Valid until
Dec 13, 2026 (83 days remaining)
Public key
EC 256-bit
Serial
05278662179E4361F17CEF8A57BDE006D06B
SHA-256 fingerprint
19:DB:FF:7F:F1:46:3B:F9:91:4D:E6:B0:39:ED:71:7B:F7:D1:6F:1B:05:94:46:F9:D5:74:50:34:9C:0E:F3:6D
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
lui-tech.de, www.lui-tech.de

Certificate Authority Authorization (CAA)

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

Never get surprised by lui-tech.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch lui-tech.de 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.