SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sb-web.cz
SSL/TLS Certificate
SSL/TLS Certificate for sb-web.cz
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- lexykm.cz
- Valid from
- Sep 22, 2026
- Valid until
- Dec 21, 2026 (71 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06F5D9A808A3E95BF2D99B50ECCC97EF6E43
- SHA-256 fingerprint
- E1:03:53:A2:4F:3C:D2:6C:25:E2:E3:B9:E8:10:5E:54:82:CB:11:59:28:CD:1D:D8:97:24:73:51:FE:6E:41:F9
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 1, 2026.
Never get surprised by sb-web.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sb-web.cz continuously, notifying you the moment anything moves across all three signals:
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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