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 mta.cat
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- cl2026041222001.dnssw.net
- Valid from
- Jul 12, 2026
- Valid until
- Oct 10, 2026 (80 days remaining)
- Public key
- EC 256-bit
- Serial
- 0541283F61431A3AF631243940B9C46D55FE
- SHA-256 fingerprint
- 93:42:75:C3:2D:48:45:94:A0:2D:21:A3:C7:67:5B:58:5D:0D:EC:F3:45:60:E2:73:98:E2:16:C8:D6:84:4E:29
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.