SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for dg-it.cn
Untrusted chain- Issued by (CA)
- Cloudflare, Inc.
- Subject
- Cloudflare
- Valid from
- Aug 6, 2026
- Valid until
- Aug 3, 2036 (3563 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 8CBCB0718B4E1833F6405B831C481858E2C8E7
- SHA-256 fingerprint
- A7:E3:66:47:99:27:06:75:0F:4A:A4:38:12:02:DC:BB:87:0A:87:26:30:1D:0D:75:DB:F0:50:1F:49:61:AB:BD
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by dg-it.cn's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dg-it.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.