SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jan-haarhoff.de
SSL/TLS Certificate
SSL/TLS Certificate for jan-haarhoff.de
Self-signed- Issued by (CA)
- jan-haarhoff.de.df-477239.dummy
- Subject
- jan-haarhoff.de.df-477239.dummy
- Valid from
- Sep 3, 2025
- Valid until
- Sep 3, 2026 (34 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 024FCDA7CB
- SHA-256 fingerprint
- 7F:EF:C3:8F:F1:61:6A:D9:84:3C:5A:B8:43:EC:5F:28:D0:33:F1:FD:AD:DB:97:03:0E:1E:83:4F:93:57:01:7A
- Chain
- jan-haarhoff.de.df-477239.dummy
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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