SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
oko-tech.de
SSL/TLS Certificate
SSL/TLS Certificate for oko-tech.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- oko-tech.de
- Valid from
- Jun 6, 2026
- Valid until
- Sep 4, 2026 (39 days remaining)
- Public key
- EC 256-bit
- Serial
- 06CFCB2F942481C0C07A9263F14E3F9B3AEA
- SHA-256 fingerprint
- 42:00:62:5D:76:8A:3A:FD:91:AB:EB:79:8B:76:11:EB:F7:0F:8F:45:39:77:B5:17:9B:55:F6:19:17:65:47:7D
- Chain
- YE2 → 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.
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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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