SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ceske-zakazky.cz
SSL/TLS Certificate
SSL/TLS Certificate for ceske-zakazky.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ceske-zakazky.cz
- Valid from
- Jul 18, 2026
- Valid until
- Oct 16, 2026 (72 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0506E3016BE17DE84A50BD975486827DED7E
- SHA-256 fingerprint
- D3:39:C0:97:B5:F7:3B:59:78:6C:9F:60:40:97:4F:1A:B6:3F:0B:48:23:44:C7:38:CD:82:0E:1D:FE:65:5B:5C
- 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
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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