SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
thu-data.ch
SSL/TLS Certificate
SSL/TLS Certificate for thu-data.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- thu-data.ch
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0563E66C8160FCFC2B311D444C83D56E4785
- SHA-256 fingerprint
- 9B:EF:4C:61:2D:66:DA:57:D3:47:3B:3A:10:80:86:A4:F9:53:2D:E1:FF:FC:A3:5E:51:92:B5:BD:DD:80:91:43
- Chain
- YR1 → 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 22, 2026.
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Uptime
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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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