SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lucasnsec.us
SSL/TLS Certificate
SSL/TLS Certificate for lucasnsec.us
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- lucasnsec.us
- Valid from
- Jul 19, 2026
- Valid until
- Oct 17, 2026 (87 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05F2D961420D10550FD42563DE5BDFBEA86A
- SHA-256 fingerprint
- 52:EC:68:DB:D4:6B:53:1B:28:53:3A:C5:DF:A8:26:32:E5:8E:E4:A9:32:4C:E3:A3:2F:D0:05:A6:6F:8A:9D:6C
- 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).