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 alef.pl
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- alef.pl
- Valid from
- Feb 18, 2025
- Valid until
- May 19, 2025 (expired 429 days ago)
- Public key
- EC 256-bit
- Serial
- 03C7199F5620EB907BE4D3A9CD2FA753CC72
- SHA-256 fingerprint
- 01:71:55:92:58:EC:5A:DD:39:F8:52:9F:D2:45:C5:BC:76:17:71:2D:EE:F1:33:8C:E6:C2:4D:7C:02:22:AA:94
- Chain
- E6 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is not among the authorities this domain's CAA records authorize (sectigo.com). This can indicate a misconfiguration or an unexpected issuance.