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 ztk.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.ztk.de
- Valid from
- Jun 5, 2026
- Valid until
- Sep 3, 2026 (44 days remaining)
- Public key
- EC 256-bit
- Serial
- 0606AF663ACF484C448CC9A4D189C6A65A63
- SHA-256 fingerprint
- 6E:3C:86:EE:B9:19:C6:62:6E:BC:2B:A8:A3:27:74:B9:62:09:10:5A:3E:F8:13:36:F3:22:FD:28:47:07:02:86
- Chain
- YE2 → Root YE → ISRG Root X2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.