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 12it.nl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 12it.nl
- Valid from
- Jun 9, 2026
- Valid until
- Sep 7, 2026 (47 days remaining)
- Public key
- RSA 3072-bit
- Serial
- 05337B3C87E2B651255FC3B3806A591B5993
- SHA-256 fingerprint
- 3F:E2:EC:9A:1F:72:28:D0:02:F9:8F:ED:50:90:9B:1E:8A:08:48:F7:CF:BB:3F:DB:19:70:EC:87:49:C8:54:69
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).