SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
janpol-sped.pl
SSL/TLS Certificate
SSL/TLS Certificate for janpol-sped.pl
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- lumi.net.pl
- Valid from
- Jul 21, 2023
- Valid until
- Oct 19, 2023 (expired 1023 days ago)
- Public key
- RSA 2048-bit
- Serial
- 0460AE177A2475BA6040663994897E12B6A1
- SHA-256 fingerprint
- CC:03:90:D0:2C:D0:D0:24:06:C6:3D:F1:DE:E2:86:AA:2E:96:88:7B:21:CB:EA:CB:98:D6:B4:DD:9B:7E:9D:EB
- Chain
- R3 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (certum.pl, letsencrypt.org).
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DNS changes
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TLS certificate
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