SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
it-set.cz
SSL/TLS Certificate
SSL/TLS Certificate for it-set.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- it-set.cz
- Valid from
- Jun 20, 2026
- Valid until
- Sep 18, 2026 (53 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05A193C68B4008BF7486E6C64A40A581E375
- SHA-256 fingerprint
- 9D:AA:04:B2:0D:9A:3D:99:F1:A3:9B:AC:8F:10:6B:F7:4F:6B:00:52:09:A1:B9:67:38:D1:81:1B:B6:75:1B:6B
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by it-set.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch it-set.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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