SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
buff-bau.ch
SSL/TLS Certificate
SSL/TLS Certificate for buff-bau.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- buffbau.ch
- Valid from
- Aug 20, 2026
- Valid until
- Nov 18, 2026 (50 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06676E085DE03719CAD8BD499EB41853A2B8
- SHA-256 fingerprint
- 13:F0:C7:D2:2F:14:54:CA:74:64:27:11:BC:50:8A:4E:88:9B:AF:F7:9E:C6:20:87:BC:92:B5:29:6E:52:E3:BF
- 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
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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