sdku.cn - robtex.com
sdku.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 172.80.22.57🇺🇸 ESITED-1172.80.0.0/17 ARIN direct allocation | ||||||
| NS | dm1.longmingdns.com ⭐ | ||||||
| A | 218.98.111.163🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| NS | dm2.longmingdns.com | ||||||
| A | 183.253.57.197🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route) | ||||||
| A | 211.99.99.56🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object | ||||||
| SOA | dm1.longmingdns.comdnsadmin@longmingdns.com serial=1766042250 | ||||||
cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.cn ⭐ | ||||||
| NS | b.dns.cn | ||||||
| NS | c.dns.cn | ||||||
| NS | d.dns.cn | ||||||
| NS | e.dns.cn | ||||||
| NS | ns.cernet.net ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2034612899 | ||||||
Same first word
Similar names
DNS History
8 records (3 active, 5 former)
●NSdm1.longmingdns.com2026-03-27 → 2026-03-30 · 3 obs
○ 2017-08-07 19:26:52
● 2026-03-27 09:18:56
● 2026-03-30 19:06:50
● 2026-03-27 09:18:56
● 2026-03-30 19:06:50
●NSdm2.longmingdns.com2026-03-27 → 2026-03-30 · 3 obs
○ 2017-08-07 19:26:52
● 2026-03-27 09:18:56
● 2026-03-30 19:06:50
● 2026-03-27 09:18:56
● 2026-03-30 19:06:50
○NSf1g1ns1.dnspod.net2016-12-04 → 2016-12-04 · 3 obs
● 2016-12-04 04:56:44
○ 2017-08-07 19:26:52
○ 2026-03-30 19:06:50
○ 2017-08-07 19:26:52
○ 2026-03-30 19:06:50
○NSf1g1ns2.dnspod.net2016-12-04 → 2016-12-04 · 3 obs
● 2016-12-04 04:56:44
○ 2017-08-07 19:26:52
○ 2026-03-30 19:06:50
○ 2017-08-07 19:26:52
○ 2026-03-30 19:06:50
○NSns1.dnsfang.com2017-08-07 → 2017-08-07 · 4 obs
○ 2016-12-04 04:56:44
● 2017-08-07 19:26:52
○ 2026-03-27 09:18:56
○ 2026-03-30 19:06:50
● 2017-08-07 19:26:52
○ 2026-03-27 09:18:56
○ 2026-03-30 19:06:50
○NSns2.dnsfang.com2017-08-07 → 2017-08-07 · 4 obs
○ 2016-12-04 04:56:44
● 2017-08-07 19:26:52
○ 2026-03-27 09:18:56
○ 2026-03-30 19:06:50
● 2017-08-07 19:26:52
○ 2026-03-27 09:18:56
○ 2026-03-30 19:06:50
○A120.55.24.1342017-08-07 → 2017-08-07 · 3 obs
● 2017-08-07 19:26:52
○ 2026-03-27 09:18:56
○ 2026-03-30 19:06:50
○ 2026-03-27 09:18:56
○ 2026-03-30 19:06:50
●A172.80.22.572026-03-27 → 2026-03-30 · 3 obs
○ 2017-08-07 19:26:52
● 2026-03-27 09:18:56
● 2026-03-30 19:06:50
● 2026-03-27 09:18:56
● 2026-03-30 19:06:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | 11 records |
| sdku.cn | dm1.longmingdns.com, dm2.longmingdns.com | - |
✅ Authoritative Response
Server:211.99.99.56
NS records: dm1.longmingdns.com, dm2.longmingdns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sdku.cn (unsigned zone)
⏱️ Timing
Total: 3912ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 172.80.22.57 |
| NS | 2 | dm1.longmingdns.com, dm2.longmingdns.com |
| SOA | 1 | dm1.longmingdns.com dnsadmin.longmingdns |
📌 Glue Records Collected
Total: 11
In-bailiwick: 10 (a.dns.cn, a.dns.cn, b.dns.cn...)
Out-of-bailiwick: 1 (ns.cernet.net)
Analysis
IP Addresses
sdku.cn points to IP number: 172.80.22.57.
Name Servers
sdku.cn is delegated to two name servers: dm1.longmingdns.com and dm2.longmingdns.com.
sdku.cn shares the same name server setup as benman.com.cn, asunday.cn, gdjinxiang.cn, rfid8.cn and katr.com.cn.
Host names with two IP numbers:
dm2.longmingdns.com points to 183.253.57.197 and 211.99.99.56.
Host names with one IP number:
dm1.longmingdns.com points to 218.98.111.163.