SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
studi0-lumos.com
SSL/TLS Certificate
SSL/TLS Certificate for studi0-lumos.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- studi0-lumos.com
- Valid from
- Sep 3, 2026
- Valid until
- Dec 2, 2026 (61 days remaining)
- Public key
- EC 256-bit
- Serial
- 05ED326B4E6B69D772CCF12E6241C04F5BCE
- SHA-256 fingerprint
- AD:F3:7C:27:39:14:1B:12:24:22:78:7A:D0:B8:62:A8:29:3D:31:56:A8:A8:5F:2C:82:BF:1B:44:54:03:47:4B
- Chain
- YE2 → Root YE → ISRG Root X2 → 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
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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