SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
smart-flow.org
SSL/TLS Certificate
SSL/TLS Certificate for smart-flow.org
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- smart-flow.com.pl
- Valid from
- Feb 12, 2025
- Valid until
- May 13, 2025 (expired 479 days ago)
- Public key
- RSA 2048-bit
- Serial
- 034AA994BDA3DAF9585986D363C5DDBA0E08
- SHA-256 fingerprint
- 6F:1B:34:50:12:FD:8A:09:27:4A:96:0F:6F:EF:58:C8:50:23:17:37:57:7F:4A:C5:A3:23:3B:97:61:39:1A:46
- Chain
- R11 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
This certificate has been served since Aug 17, 2026.
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DNS changes
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TLS certificate
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