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 e-f.one
Expiring soon- Issued by (CA)
- nazwa.pl Sp. z o.o.
- Subject
- e-f.one
- Valid from
- Nov 1, 2026
- Valid until
- Nov 30, 2026 (20 days remaining)
- Public key
- EC 384-bit
- Serial
- 4A182DC041CFE398AF6015AF60046E43
- SHA-256 fingerprint
- 03:07:00:4A:3F:ED:4C:D8:F0:2B:EF:C1:A5:03:E5:DC:19:C1:2D:35:D3:2C:79:E2:A7:90:52:47:D3:2F:7D:FF
- Chain
- nazwaSSL DV TLS G2 E29 CA → Certum EC-384 CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
CAA restricts issuance to certum.pl, letsencrypt.org; we couldn't map the serving CA (nazwa.pl Sp. z o.o.) to one of these identifiers.
This certificate has been served since Nov 2, 2026.
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TLS certificate
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