SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
it-idea.fi
SSL/TLS Certificate
SSL/TLS Certificate for it-idea.fi
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- it-idea.fi
- Valid from
- May 26, 2026
- Valid until
- Aug 24, 2026 (expired 11 days ago)
- Public key
- RSA 2048-bit
- Serial
- 064F7F05317DC2AD28BAE9DA904D0191B1B3
- SHA-256 fingerprint
- 43:91:E6:F4:B4:5A:9B:AB:C6:8A:82:CA:C5:2A:AF:7F:08:E2:AA:10:DF:D3:8A:2A:77:B6:52:C0:30:55:08:6E
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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