SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for icoup.de
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- icoup.de
- Valid from
- Sep 22, 2025
- Valid until
- Dec 21, 2025 (expired 267 days ago)
- Public key
- RSA 4096-bit
- Serial
- 0684A2D1F6242C7A84B0277FE5D11589D2DC
- SHA-256 fingerprint
- 9B:CB:07:35:53:65:DF:11:7C:6D:0B:F7:65:0B:0B:9C:E6:8B:01:C4:89:96:10:60:B9:3A:2B:DB:89:90:6C:80
- Chain
- R12 → 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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