SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
h-square.cz
SSL/TLS Certificate
SSL/TLS Certificate for h-square.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- alintrust.com
- Valid from
- Aug 13, 2026
- Valid until
- Nov 11, 2026 (88 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 063CE9F05B0BDF53DB2B4D9E3678CF6D3D5C
- SHA-256 fingerprint
- 80:32:95:29:1D:F8:6F:C2:5A:DE:E3:E3:73:A1:E7:20:6B:7D:DB:10:59:91:68:23:70:D8:22:67:80:43:FA:FE
- 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 Jul 26, 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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