SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kasik-sails.cz
SSL/TLS Certificate
SSL/TLS Certificate for kasik-sails.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.kasik-sails.cz
- Valid from
- Oct 14, 2026
- Valid until
- Jan 12, 2027 (86 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05E0160E5C1EDF5F2CCBE585574C5796DA2B
- SHA-256 fingerprint
- 99:62:70:F2:EF:DA:90:C3:10:43:D6:D4:5C:93:DF:EC:A6:5F:04:74:10:D7:EC:B0:CB:4A:52:57:FC:1E:37:69
- 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 Oct 1, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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