SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
a-test.fi
SSL/TLS Certificate
SSL/TLS Certificate for a-test.fi
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- 1aaa.omasivu.info
- Valid from
- Aug 13, 2026
- Valid until
- Nov 11, 2026 (61 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 06E2C2949C51C98D965507D35BA8A053701A
- SHA-256 fingerprint
- 30:96:77:00:CF:89:84:BF:56:5C:83:1D:04:E4:A8:55:B8:D9:29:AC:27:1A:D9:3C:7D:E2:DE:70:A7:D3:DB:E7
- Chain
- YR1 → Root YR → ISRG Root X1
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 Aug 30, 2026.
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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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