SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lumainos.net
SSL/TLS Certificate
SSL/TLS Certificate for lumainos.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- lumainos.net
- Valid from
- Jul 28, 2026
- Valid until
- Oct 26, 2026 (34 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0559C7EDEE23DCDEE4DFDE14FA70E9F194E8
- SHA-256 fingerprint
- CF:F8:B6:C7:4B:03:BE:BC:81:3E:CA:1A:18:08:EC:87:92:40:67:87:82:8A:02:0A:22:EB:6F:3B:BA:1A:E8:EE
- Chain
- YR2 → 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 Sep 12, 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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