SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dand-sign.cz
SSL/TLS Certificate
SSL/TLS Certificate for dand-sign.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.dand-sign.cz
- Valid from
- Oct 20, 2026
- Valid until
- Jan 18, 2027 (68 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0658D5F7AD80E683BA3D2F0DDB59278F9C85
- SHA-256 fingerprint
- 11:D5:F2:33:8C:CB:1F:00:88:D1:42:66:3D:5E:73:A4:61:8D:52:60:91:C8:4F:8C:41:F6:DB:11:01:52:6E:F1
- 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 dand-sign.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dand-sign.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, 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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