SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
leraren-24.org
SSL/TLS Certificate
SSL/TLS Certificate for leraren-24.org
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.kn.nu
- Valid from
- Sep 6, 2026
- Valid until
- Dec 5, 2026 (47 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 055D9D01728D0DD9B43C3C9177E602FA7284
- SHA-256 fingerprint
- 35:8F:3D:86:2B:E6:E9:5D:4D:3C:27:22:54:A0:9F:33:74:0E:5E:A5:14:46:AC:42:3E:90:0B:13:11:48:52:7A
- 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.
This certificate has been served since Sep 13, 2026.
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TLS certificate
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