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 dumar.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dumar.ch
- Valid from
- Jul 10, 2026
- Valid until
- Oct 8, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05E605E3FF4B422788897EFC56A62442CA7D
- SHA-256 fingerprint
- 69:5E:D5:AA:8B:41:A3:CE:DC:EC:08:77:C9:55:2F:34:CD:30:DF:AB:57:9E:5E:D7:07:A7:B7:F3:93:A3:8A:73
- 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.