SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for aqqa.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- aqqa.cz
- Valid from
- Jul 8, 2026
- Valid until
- Oct 6, 2026 (31 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05552FA6CD74C2ABFD05E56E68CE816E1501
- SHA-256 fingerprint
- CC:38:2D:C8:B8:F4:5F:B6:0D:41:78:78:2A:32:A6:94:0D:EE:14:24:D9:C7:C6:C4:E0:CB:8B:BE:0B:A1:C5:92
- 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.
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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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