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 c12k.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- c12k.com.kup.corpex-kunden.de
- Valid from
- Jun 4, 2026
- Valid until
- Sep 2, 2026 (42 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DCB9548F682B666312D2DF2C664BF2965A
- SHA-256 fingerprint
- 28:40:AA:4B:47:F5:2B:34:28:DF:2C:A7:15:42:D1:70:A4:C8:AD:6B:17:C5:6C:15:E4:83:11:F9:B9:8D:6E:CC
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.