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 3km.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 3km.ch
- Valid from
- Jul 11, 2026
- Valid until
- Oct 9, 2026 (80 days remaining)
- Public key
- EC 256-bit
- Serial
- 05E4E74729E7B923AC660A0F5B846C26A9DF
- SHA-256 fingerprint
- 26:A0:1F:7E:E4:8A:9E:88:60:D8:88:C8:52:E3:1A:4B:DD:EB:7B:1C:3D:3F:2C:6D:99:47:94:2F:52:0D:A3:96
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).