csdn.com - dns.ninja
csdn.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 76.76.21.21🇺🇸 Amazon76.76.21.0/24 EC2 Prefix | ||||||
| NS | dns13.hichina.com ⭐ | ||||||
| A | 2408:4009:501::21🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.42🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.52🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.202🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.212🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.42🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.52🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.112🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.122🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| NS | dns14.hichina.com | ||||||
| A | 2408:4009:501::22🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.41🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.51🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.201🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.211🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.41🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.51🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.111🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.121🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| MX | mxbiz1.qq.com ⭐ | ||||||
| MX | mxbiz2.qq.com(10) | ||||||
| SOA | dns13.hichina.comhostmaster@hichina.com 2026-05-28 #9 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1783193846 | ||||||
Subdomains
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
●NSdns13.hichina.com2026-02-19 → 2026-07-04 · 3 obs
● 2026-02-19 23:44:56
● 2026-07-04 19:39:56
●NSdns14.hichina.com2026-02-19 → 2026-07-04 · 3 obs
● 2026-02-19 23:44:56
● 2026-07-04 19:39:56
○NSf1g1ns1.dnspod.net2015-08-15 → 2016-11-03 · 4 obs
● 2016-11-03 00:15:52
○ 2026-02-19 23:44:56
○ 2026-07-04 19:39:56
○NSf1g1ns2.dnspod.net2015-08-15 → 2016-11-03 · 4 obs
● 2016-11-03 00:15:52
○ 2026-02-19 23:44:56
○ 2026-07-04 19:39:56
○MXmail.csdn.com2015-08-15 → 2016-11-03 · 4 obs
● 2016-11-03 00:15:52
○ 2026-02-19 23:44:56
○ 2026-07-04 19:39:56
●MXmxbiz1.qq.com2026-02-19 → 2026-07-04 · 5 obs
● 2026-02-19 23:44:56
○ 2026-07-01 07:46:22
● 2026-07-01 09:24:58
● 2026-07-04 19:39:56
●MXmxbiz2.qq.com2026-02-19 → 2026-07-04 · 5 obs
● 2026-02-19 23:44:56
○ 2026-07-01 07:46:22
● 2026-07-01 09:24:58
● 2026-07-04 19:39:56
○A101.201.172.2292016-01-28 → 2016-11-03 · 4 obs
● 2016-11-03 00:15:52
○ 2026-02-19 23:44:56
○ 2026-07-04 19:39:56
●A76.76.21.212026-02-19 → 2026-07-04 · 5 obs
● 2026-02-19 23:44:56
○ 2026-07-01 07:46:22
● 2026-07-01 09:24:58
● 2026-07-04 19:39:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| csdn.com | dns13.hichina.com, dns14.hichina.com | 18 records |
✅ Authoritative Response
Server:120.76.107.42
NS records: dns13.hichina.com, dns14.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for csdn.com (unsigned zone)
⏱️ Timing
Total: 520ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 76.76.21.21 |
| NS | 2 | dns14.hichina.com, dns13.hichina.com |
| MX | 2 | mxbiz1.qq.com (pri: 5), mxbiz2.qq.com (pri: 10) |
| SOA | 1 | dns13.hichina.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 18
Out-of-bailiwick: 18 (dns13.hichina.com, dns13.hichina.com, dns13.hichina.com...)
Analysis
Hierarchy
www.csdn.com and mail.csdn.com each fall under csdn.com as their parent domain.
IP Addresses
csdn.com resolves to just one IP address, 76.76.21.21.
Two other host names, along with phraselingo.com, sora.org and kuddl.com, also share IP numbers with csdn.com.
Name Servers
csdn.com uses two name servers for its delegation: dns13.hichina.com and dns14.hichina.com.
csdn.com shares its NS records with other domains, for example pjqn.cn, capco.com.cn, chinahaiyue.com and two others.
At least some of csdn.com's name servers are shared with other domains, for example azura.cn, slan-bio.com, tradeyun.com and two more.
These name servers tend to be deployed in combination with the name servers expirens3.hichina.com and expirens4.hichina.com.
DNS names with 9 IP addresses:
Hostname dns13.hichina.com directs to 39.96.153.42, 39.96.153.52 and 47.118.199.202 along with 6 other IP addresses.
Hostname dns14.hichina.com directs to 39.96.153.41, 39.96.153.51 and 47.118.199.201 along with 6 other IP addresses.
Mail Servers
csdn.com is served by two mail servers, mxbiz1.qq.com and mxbiz2.qq.com.
Among the domains sharing a mail server setup with csdn.com are bmforum.net, kenxu.net, cntebo.com and two others.
There is at least a partial MX overlap between csdn.com and other domains, including bat.me, qp365.net, izhuan.com and two others.