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 it-pub-lucas.de

Valid
Issued by (CA)
Let's Encrypt
Subject
it-pub-lucas.de
Valid from
Aug 6, 2026
Valid until
Nov 4, 2026 (36 days remaining)
Public key
EC 256-bit
Serial
05F6B916AE312AE30576A890209825EBA690
SHA-256 fingerprint
CE:72:45:CA:D9:EC:D8:44:D0:E3:EE:56:19:B6:B6:4D:0D:4C:17:75:73:71:97:85:5E:06:53:9B:C9:C8:CA:40
Chain
YE2 → Root YE → ISRG Root X2
Subject Alternative Names (2)
it-pub-lucas.de, www.it-pub-lucas.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 28, 2026.

Never get surprised by it-pub-lucas.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch it-pub-lucas.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.