📄WHOIS
Internet Domain Name System Beijing Engineering Research Center LLC (ZDNS) · registered 29 years ago · expires 4/29/2030
🌐DNS
1 A · 3 MX · 5 NS · 1 SOA · 3 TXT · 3 AAAA
🔒SSL/TLS
DigiCert, Inc. · TLSv1.3 · expires in 70d · 2 SANs
✉️Email Auth
SPF ✓ · DKIM ✓ · DMARC ✗ (p=none)
💻Tech Stack
Host: CHINANET BACKBONE · Email: Self-hosted · nginx
📡HTTP
1 redirect → 200 · HSTS ✓ · CSP ✗ · X-Frame ✗ · Nosniff ✓
🛡️Security
B (155/215) · 1 critical · 2 high
📈Deliverability
B (83/100) · 3 MX · 3 IPs · 4 issue(s)
🔍Subdomains
5 found · 112 answered — email, m, mobile, us, www