SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
book-online.ch
SSL/TLS Certificate
SSL/TLS Certificate for book-online.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- imaago.ch
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (56 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05B145F61ED5C9CB3FA2F82CEE90D2F0B12E
- SHA-256 fingerprint
- 92:33:B8:1F:9E:96:EC:B8:07:29:3D:65:CA:45:5D:84:09:28:55:B6:D8:CC:14:92:D9:2B:76:14:9C:68:94:F2
- 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.
This certificate has been served since Sep 3, 2026.
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Uptime
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DNS changes
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TLS certificate
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