SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
defa-stiftung.de
SSL/TLS Certificate
SSL/TLS Certificate for defa-stiftung.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.defa-stiftung.de
- Valid from
- Jun 30, 2026
- Valid until
- Sep 28, 2026 (63 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 054E706196981C4B206F764F218BB721C8E7
- SHA-256 fingerprint
- 29:66:71:CA:4E:EB:16:59:A4:98:7B:76:14:98:CA:B2:81:8C:55:A1:BE:25:80:CE:33:D1:BD:A5:42:6A:38:36
- 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.
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Uptime
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DNS changes
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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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