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 cptec.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cptec.de
- Valid from
- Jun 7, 2026
- Valid until
- Sep 5, 2026 (45 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 057E85C5B51D51097728A350643F0F5CA9B4
- SHA-256 fingerprint
- 2A:AF:30:EB:2B:41:72:BE:1C:F9:58:68:13:7C:43:BB:89:18:3A:F8:B8:61:FF:C8:D1:9E:79:E5:8A:E1:67:C9
- 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.