SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
franklin-institute.de
SSL/TLS Certificate
SSL/TLS Certificate for franklin-institute.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- franklin-institute.de
- Valid from
- Oct 29, 2026
- Valid until
- Jan 27, 2027 (77 days remaining)
- Public key
- EC 256-bit
- Serial
- 0568B0BA5D2ADD395055B21A4732840D516C
- SHA-256 fingerprint
- EC:5A:B1:DE:BD:DC:09:16:EC:4A:96:28:B8:22:82:FE:AF:C9:08:D4:96:A5:49:62:3E:D7:05:BE:6E:2D:BE:D4
- 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.
We've observed 2 previous certificates for this host. This certificate has been served since Nov 9, 2026.
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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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