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 wk-in.de
Self-signed- Issued by (CA)
- wk-in.de
- Subject
- wk-in.de
- Valid from
- Apr 22, 2025
- Valid until
- Apr 22, 2026 (expired 207 days ago)
- Public key
- RSA 2048-bit
- Serial
- D4258D13
- SHA-256 fingerprint
- A9:96:90:6A:69:0D:3D:E4:37:45:3A:04:11:28:41:37:C8:BD:C5:D2:DA:35:6F:27:88:E9:21:CA:DA:A6:A4:7D
- Chain
- wk-in.de
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Oct 23, 2026.
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Uptime
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DNS changes
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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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