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 k2net.pl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- k2net.pl
- Valid from
- May 25, 2026
- Valid until
- Aug 23, 2026 (32 days remaining)
- Public key
- EC 256-bit
- Serial
- 06DA40161956960ABC4E4CFEE9F6F423EFE2
- SHA-256 fingerprint
- 04:37:A6:24:27:3A:42:C6:24:C4:4A:16:93:A8:42:AA:E6:F5:D4:55:6A:6C:06:8A:50:ED:24:1A:FD:12:39:05
- Chain
- E8 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.