SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-data.cn
SSL/TLS Certificate
SSL/TLS Certificate for s-data.cn
Untrusted chain- Issued by (CA)
- Let's Encrypt
- Subject
- *.s-data.cn
- Valid from
- Jul 5, 2026
- Valid until
- Oct 3, 2026 (67 days remaining)
- Public key
- EC 256-bit
- Serial
- 0566E17D12492A0A8E628712759DB0703492
- SHA-256 fingerprint
- 83:98:2D:59:53:75:58:6D:CA:FE:31:65:03:72:F0:95:FD:49:5B:89:5E:4E:95:1B:CB:95:EA:7E:19:57:68:AD
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by s-data.cn's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch s-data.cn 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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