SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
open-24.cz
SSL/TLS Certificate
SSL/TLS Certificate for open-24.cz
Valid- Issued by (CA)
- Google Trust Services
- Subject
- open-24.cz
- Valid from
- Aug 4, 2026
- Valid until
- Nov 2, 2026 (54 days remaining)
- Public key
- EC 256-bit
- Serial
- E44767DDB08991D20E00C7CE70F160BE
- SHA-256 fingerprint
- B3:D2:AC:ED:97:50:2D:A7:AD:1D:4C:6F:D5:F2:43:C3:A1:B9:59:9A:8E:CE:2B:ED:4A:1D:E1:B5:75:D0:45:70
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by open-24.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch open-24.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.