net-study.cn - robtex.com
net-study.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 177.211.171.173🇧🇷 UNSPECIFIED160.0.0.0/3 | ||||||
| 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=1774356974 | ||||||
cn
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| 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=2034802986 | ||||||
Same first word
net-study.cn |
DNS History
15 records (3 active, 12 former)
●NSdm1.longmingdns.com2026-03-29 → 2026-05-17 · 3 obs
● 2026-03-29 22:44:44
● 2026-05-17 09:34:04
●NSdm2.longmingdns.com2026-03-29 → 2026-05-17 · 3 obs
● 2026-03-29 22:44:44
● 2026-05-17 09:34:04
○NSgordon.ns.cloudflare.com2026-03-04 → 2026-03-07 · 5 obs
● 2026-03-04 05:45:14
● 2026-03-07 10:05:00
○ 2026-03-29 22:44:44
○ 2026-05-17 09:34:04
○NSnina.ns.cloudflare.com2026-03-04 → 2026-03-07 · 5 obs
● 2026-03-04 05:45:14
● 2026-03-07 10:05:00
○ 2026-03-29 22:44:44
○ 2026-05-17 09:34:04
○NSns11.xincache.com2015-08-13 → 2015-08-13 · 3 obs
○ 2015-12-09 02:05:58
○ 2026-05-17 09:34:04
○NSns12.xincache.com2015-08-13 → 2015-08-13 · 3 obs
○ 2015-12-09 02:05:58
○ 2026-05-17 09:34:04
○NSns3.dnsdun.com2020-02-20 → 2020-02-20 · 4 obs
● 2020-02-20 00:54:36
○ 2026-03-04 05:45:14
○ 2026-05-17 09:34:04
○NSns3.dnsdun.net2020-02-20 → 2020-02-20 · 4 obs
● 2020-02-20 00:54:36
○ 2026-03-04 05:45:14
○ 2026-05-17 09:34:04
○A103.92.14.122020-02-20 → 2020-02-20 · 4 obs
● 2020-02-20 00:54:36
○ 2026-03-04 05:45:14
○ 2026-05-17 09:34:04
○A104.21.21.822026-03-04 → 2026-03-07 · 5 obs
● 2026-03-04 05:45:14
● 2026-03-07 10:05:00
○ 2026-03-29 22:44:44
○ 2026-05-17 09:34:04
○A115.47.41.2072015-08-13 → 2015-08-13 · 3 obs
○ 2015-12-09 02:05:58
○ 2026-05-17 09:34:04
○A172.67.197.142026-03-04 → 2026-03-07 · 5 obs
● 2026-03-04 05:45:14
● 2026-03-07 10:05:00
○ 2026-03-29 22:44:44
○ 2026-05-17 09:34:04
●A177.211.171.1732026-03-29 → 2026-05-17 · 3 obs
● 2026-03-29 22:44:44
● 2026-05-17 09:34:04
○A2606:4700:3033::6815:15522026-03-04 → 2026-03-07 · 5 obs
● 2026-03-04 05:45:14
● 2026-03-07 10:05:00
○ 2026-03-29 22:44:44
○ 2026-05-17 09:34:04
○A2606:4700:3037::ac43:c50e2026-03-04 → 2026-03-07 · 5 obs
● 2026-03-04 05:45:14
● 2026-03-07 10:05:00
○ 2026-03-29 22:44:44
○ 2026-05-17 09:34:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | e.dns.cn, b.dns.cn, c.dns.cn, a.dns.cn... | - |
| net-study.cn | dm1.longmingdns.com, dm2.longmingdns.com | - |
✅ Authoritative Response
Server:218.98.111.163
NS records: dm1.longmingdns.com, dm2.longmingdns.com
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at net-study.cn: Error: DNS query timeout: 203.119.29.1 for DS net-study.cn
⏱️ Timing
Total: 4641ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 177.211.171.173 |
| NS | 2 | dm1.longmingdns.com, dm2.longmingdns.com |
| SOA | 1 | dm1.longmingdns.com dnsadmin.longmingdns |
Analysis
IP Addresses
net-study.cn points to one IP number: 177.211.171.173.
other host names, for instance yobosoft.cn, cjur.cn, apptree.com.cn and 2 other share IP numbers with net-study.cn.
Name Servers
net-study.cn is delegated to two name servers, dm1.longmingdns.com and dm2.longmingdns.com.
net-study.cn shares the same name server setup with other domains, for instance hnweite.com.cn, zhu19.cn, whfyme.cn and 2 other.
Host names with two IP numbers:
The host name dm2.longmingdns.com points to: 183.253.57.197 and 211.99.99.56.
Host names with one IP number:
The host name dm1.longmingdns.com points to: 218.98.111.163.