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 nplan.si
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- nplan.si
- Valid from
- Jul 14, 2025
- Valid until
- Oct 12, 2025 (expired 365 days ago)
- Public key
- RSA 4096-bit
- Serial
- 06A18A10BE6E66B0FE0A2FB785CC9EF9697A
- SHA-256 fingerprint
- D6:EC:07:9E:C8:6E:82:9E:B8:5C:03:9E:3C:53:50:18:66:0B:C4:25:69:36:9C:3A:2D:58:EA:9B:33:1E:6B:3B
- Chain
- R11 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
This certificate has been served since Aug 9, 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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