SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jr-build.cz
SSL/TLS Certificate
SSL/TLS Certificate for jr-build.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- jr-build.cz
- Valid from
- Jul 24, 2026
- Valid until
- Oct 22, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06335EDC7EAEB63E366CEE678740B9535E6E
- SHA-256 fingerprint
- 36:0A:E3:09:A2:83:95:BE:E4:1D:6F:17:DF:C8:07:3D:74:8C:8E:95:8D:DC:67:94:D9:9C:86:34:FA:05:7B:86
- 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.
Never get surprised by jr-build.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch jr-build.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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