SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
oskole.sk
SSL/TLS Certificate
SSL/TLS Certificate for oskole.sk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- oskole.sk
- Valid from
- Aug 2, 2026
- Valid until
- Oct 31, 2026 (55 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 066C4DD919DF2C5928DC43D7A9B0C8B3D39E
- SHA-256 fingerprint
- 8D:A0:EE:FE:60:62:B5:84:3A:D8:00:9E:54:F0:5C:3C:A3:14:BD:9C:55:0B:A9:04:0D:12:3E:5B:4B:BE:62:BC
- 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.
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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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