SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
korff-stiftung.de
SSL/TLS Certificate
SSL/TLS Certificate for korff-stiftung.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- korff-stiftung.com
- Valid from
- Aug 28, 2026
- Valid until
- Nov 26, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052CE253E91A4E16F4DC4791F8B5EF246175
- SHA-256 fingerprint
- EB:0C:70:F3:82:05:69:33:B8:BC:32:C3:06:D7:B5:D0:13:B4:13:06:27:3E:4E:AC:91:B7:26:1A:78:DA:A6:22
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by korff-stiftung.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch korff-stiftung.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.