SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hack-academia.com
SSL/TLS Certificate
SSL/TLS Certificate for hack-academia.com
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- secure.atw.hu
- Valid from
- Jan 30, 2020
- Valid until
- Apr 29, 2020 (expired 2379 days ago)
- Public key
- RSA 2048-bit
- Serial
- 03B35C652B258DE364ED65742638BEF851D6
- SHA-256 fingerprint
- F8:DA:8E:ED:CF:0D:F3:D1:28:6E:E0:3A:55:DC:D9:B7:BB:DF:23:86:59:BD:F4:39:D9:09:B3:A7:73:1E:5E:F9
- Chain
- Let's Encrypt Authority X3
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Oct 11, 2026.
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TLS certificate
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