cdou.edu.cn - robtex.com
cdou.edu.cn
edu.cn
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | dns2.edu.cn ⭐ | ||||||
| NS | dns.edu.cn | ||||||
| NS | dns3.edu.cn | ||||||
| NS | ns2.cernet.net | ||||||
| NS | ns4.cernet.net | ||||||
| NS | ns5.cernet.net | ||||||
| SOA | dns.edu.cnhostmaster@net.edu.cn 2026-05-08 #24 | ||||||
Subdomains
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSdns1.cdou.edu.cn2026-04-13 → 2026-05-10 · 2 obs
● 2026-05-10 23:08:08
●NSdns2.cdou.edu.cn2026-04-13 → 2026-05-10 · 2 obs
● 2026-05-10 23:08:08
●MXmx1.yunyou.top2026-04-13 → 2026-05-10 · 2 obs
● 2026-05-10 23:08:08
●MXmx2.yunyou.top2026-04-13 → 2026-05-10 · 2 obs
● 2026-05-10 23:08:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| edu.cn | dns.edu.cn, ns2.cernet.net, ns4.cernet.net, ns5.cernet.net... | 6 records |
| cdou.edu.cn | dns2.sc.edu.cn, dns1.sc.edu.cn | 4 records |
✅ Authoritative Response
Server:202.112.14.136
NS records: dns2.sc.edu.cn, dns1.sc.edu.cn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cdou.edu.cn (unsigned zone)
⏱️ Timing
Total: 2162ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns2.cdou.edu.cn, dns1.cdou.edu.cn |
| MX | 2 | mx2.yunyou.top (pri: 10), mx1.yunyou.top (pri: 5) |
| TXT | 1 | v=spf1 include:yunyou.top -all |
| SOA | 1 | dns1.cdou.edu.cn master.cdou.edu.cn |
📌 Glue Records Collected
Total: 10
In-bailiwick: 6 (dns.edu.cn, dns.edu.cn, dns2.edu.cn...)
Out-of-bailiwick: 4 (dns2.sc.edu.cn, dns1.sc.edu.cn, dns2.sc.edu.cn...)
Analysis
Hierarchy
cdou.edu.cn is parent of dns2.cdou.edu.cn and dns1.cdou.edu.cn.
Name Servers
cdou.edu.cn is delegated to four name servers: dns1.cdou.edu.cn, dns2.cdou.edu.cn, dns1.sc.edu.cn and dns2.sc.edu.cn.
cdou.edu.cn at least partially shares name servers with other domains, including scyesz.edu.cn, lzylqx.edu.cn, vfcm.edu.cn, xcmc.edu.cn and njvtc.edu.cn.
these name servers are commonly used with dns1.scyesz.edu.cn, dns2.scyesz.edu.cn, dns1.njvtc.edu.cn and dns2.njvtc.edu.cn.
Host names with two IP numbers:
dns1.sc.edu.cn points to 2001:da8:6000:0:202:112:14:135 and 202.112.14.135
dns2.sc.edu.cn points to 2001:da8:6000:0:202:112:14:136 and 202.112.14.136
Host names with one IP number:
dns1.cdou.edu.cn points to 202.112.14.135
dns2.cdou.edu.cn points to 202.112.14.136
Host names pointing to 202.112.14.135: dns1.sc.edu.cn and dns1.cdou.edu.cn
Host names pointing to 202.112.14.136: dns2.sc.edu.cn and dns2.cdou.edu.cn
Mail Servers
cdou.edu.cn is handled by two mail servers: mx1.yunyou.top and mx2.yunyou.top.
cdou.edu.cn shares its mail server setup with other domains, including fzjinhuida.com, demchem.com.cn, chinaxxhs.com, hok.com.cn and tonews.cn.
cdou.edu.cn shares some mail servers with other domains, for instance yilanfen.net, saiap.com, sellergloab.com and paloon.com.cn.
Host names with two IPs:
mx1.yunyou.top points to: 2404:ccc0:263:103:5054:ff:fe4a:5abe and 128.14.74.39
mx2.yunyou.top points to: 211.149.239.73 and 211.149.240.37