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 wseit.pl
Valid- Issued by (CA)
- cyber_Folks S.A.
- Subject
- *.wseit.pl
- Valid from
- May 18, 2026
- Valid until
- Dec 3, 2026 (134 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 661CD4EA50329166FAB624D563BFA146
- SHA-256 fingerprint
- CD:2E:20:F6:9A:14:36:1B:7B:FB:08:1D:F0:62:F3:19:D3:A0:CB:F8:E0:1A:2C:69:6F:FE:E9:0E:CC:48:3F:20
- Chain
- cyber_Folks → Certum Global Services CA SHA2 → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
CAA restricts issuance to certum.pl, letsencrypt.org; we couldn't map the serving CA (cyber_Folks S.A.) to one of these identifiers.