SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
schinzler-stiftung.org
SSL/TLS Certificate
SSL/TLS Certificate for schinzler-stiftung.org
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- schinzler-stiftung.org
- Valid from
- Sep 5, 2026
- Valid until
- Dec 4, 2026 (49 days remaining)
- Public key
- EC 256-bit
- Serial
- 050FB322A6EB029A0D214CA0B9F4F117964D
- SHA-256 fingerprint
- 4A:0C:66:36:DE:0A:68:B7:DF:93:7A:55:71:26:6E:EF:BB:1D:BC:60:DF:29:A8:7E:71:5D:F1:D1:02:CD:1A:6B
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
We've observed 1 previous certificate for this host. This certificate has been served since Sep 19, 2026.
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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.
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