SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zeugnis-check.ch
SSL/TLS Certificate
SSL/TLS Certificate for zeugnis-check.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- arbeitszeugnis-erstellen.ch
- Valid from
- Jul 22, 2026
- Valid until
- Oct 20, 2026 (89 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05B0DCE34AA1AC922C319843A9FE0C07CA39
- SHA-256 fingerprint
- E9:4F:9A:DE:97:E2:F4:3B:F2:EF:A6:23:88:A5:C6:2E:6F:AC:EE:A1:FF:3E:97:20:1A:1E:54:4E:99:BC:28:59
- 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.
Never get surprised by zeugnis-check.ch's certificate expiring
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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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