SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ruhr-aktiv.de
SSL/TLS Certificate
SSL/TLS Certificate for ruhr-aktiv.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ruhr-aktiv.de
- Valid from
- Jul 23, 2026
- Valid until
- Oct 21, 2026 (89 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052AE4CB4FA445AA517CA07F70FD57DFC462
- SHA-256 fingerprint
- 91:DD:AC:79:2E:B2:1C:27:65:20:B2:26:28:31:B8:DF:96:06:1C:5E:5D:DA:9C:57:AC:E6:97:C7:D2:44:2F:D2
- Chain
- YR1 → Root YR → 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
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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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