SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jan-mader.de
SSL/TLS Certificate
SSL/TLS Certificate for jan-mader.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- www.jan-mader.de
- Valid from
- Jul 6, 2026
- Valid until
- Jan 20, 2027 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- D64684999C30D53A501F73DE7B064081
- SHA-256 fingerprint
- 4D:18:26:45:F2:04:F4:95:2E:ED:3B:A8:19:DD:5E:59:1E:64:96:DA:AD:CE:95:B2:87:31:93:E4:DC:7E:C1:8F
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
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, CNAME, TXT 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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