SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
js-partner.cz
SSL/TLS Certificate
SSL/TLS Certificate for js-partner.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.js-partner.cz
- Valid from
- Sep 5, 2026
- Valid until
- Dec 4, 2026 (43 days remaining)
- Public key
- EC 256-bit
- Serial
- 0627B877997C4BE4E79CB25606C31E89ECB4
- SHA-256 fingerprint
- 1B:74:51:5C:85:5E:25:D4:16:A9:85:44:0B:03:87:85:CE:0A:94:D2:77:AC:CD:4A:F7:00:6D:E0:9A:65:3C:70
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 30, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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