SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zukunft-lehre.org
SSL/TLS Certificate
SSL/TLS Certificate for zukunft-lehre.org
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- zukunft-lehre.org
- Valid from
- Sep 11, 2026
- Valid until
- Dec 10, 2026 (52 days remaining)
- Public key
- EC 256-bit
- Serial
- 069FF19CC58455AA6FD9FA2465FE85DB1AF4
- SHA-256 fingerprint
- EE:D4:A8:E2:58:24:F3:26:25:59:49:42:D9:77:14:8D:DA:2C:AD:B6:AD:2E:97:37:38:CF:41:25:4F:C0:62:52
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
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 zukunft-lehre.org's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zukunft-lehre.org 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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.