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 yuppi.cz
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- www.yuppi.cz
- Valid from
- Jun 25, 2026
- Valid until
- Sep 23, 2026 (63 days remaining)
- Public key
- EC 384-bit
- Serial
- 391B82E78A1CB4AA043F7FCBFFF5D6EE
- SHA-256 fingerprint
- 9D:B9:48:03:B4:91:23:D0:75:7C:A6:07:A1:69:EE:92:DB:28:CA:CF:16:36:2A:42:85:B9:71:58:C2:4B:AA:1D
- Chain
- ZeroSSL ECC DV SSL CA 2 → Sectigo Public Server Authentication Root E46 → USERTrust ECC Certification Authority
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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