coolstudy.com.cn - robtex.com
coolstudy.com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 39.105.168.119🇨🇳 Alibaba-Cloud39.104.0.0/15 CT BeiJing IDC | ||||||
| NS | dns9.hichina.com ⭐ | ||||||
| A | 2408:4009:501::17🇨🇳 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 | dns10.hichina.com | ||||||
| A | 2408:4009:501::18🇨🇳 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 | mx.ym.163.com ⭐ | ||||||
| A | 111.124.200.35🇨🇳 CHINANET-Guizhou-Guian-IDC111.124.192.0/19 | ||||||
| TXT | v=spf1 include:spf.163.com ~all | ||||||
| SOA | dns9.hichina.comhostmaster@hichina.com 2026-01-09 #13 | ||||||
com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.cn ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | c.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | cns.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | d.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | e.dns.cn ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2030510462 | ||||||
Same first word
coolstudy.com.cn |
coolstudy.org |
coolstudy.ru |
Similar names
DNS History
5 records (4 active, 1 former)
●NSdns10.hichina.com2018-12-29 → 2026-04-12 · 2 obs
● 2026-04-12 08:18:22
●NSdns9.hichina.com2018-12-29 → 2026-04-12 · 2 obs
● 2026-04-12 08:18:22
●MXmx.ym.163.com2018-12-29 → 2026-04-12 · 2 obs
● 2026-04-12 08:18:22
○A123.56.45.322018-12-29 → 2018-12-29 · 3 obs
○ 2026-04-10 11:19:52
○ 2026-04-12 08:18:22
●A39.105.168.1192026-04-10 → 2026-04-12 · 3 obs
● 2026-04-10 11:19:52
● 2026-04-12 08:18:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| coolstudy.com.cn | dns9.hichina.com, dns10.hichina.com | - |
✅ Authoritative Response
Server:139.224.142.111
NS records: dns9.hichina.com, dns10.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coolstudy.com.cn (unsigned zone)
⏱️ Timing
Total: 4573ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 39.105.168.119 |
| NS | 2 | dns9.hichina.com, dns10.hichina.com |
| MX | 1 | mx.ym.163.com (pri: 10) |
| TXT | 1 | v=spf1 include:spf.163.com ~all |
| SOA | 1 | dns9.hichina.com hostmaster.hichina.com |
Analysis
IP Addresses
coolstudy.com.cn points to a single IP number: 39.105.168.119.
Other host names, for instance kuaikuenglish.com and www.kuaikuenglish.com, share IP numbers with coolstudy.com.cn.
Name Servers
coolstudy.com.cn is delegated to two name servers: dns10.hichina.com and dns9.hichina.com.
coolstudy.com.cn uses the same name server setup as other domains, for instance 818ecom.com, bsjmotoparts.com, hangzhoujiazheng.com, aboboo.com and splawyer.com.
coolstudy.com.cn shares name servers with other domains at least partially, for instance cs-box.com, ufanw.com, dncj.net, qiqu666.com and 8oj.cn.
These name servers are commonly used with expirens3.hichina.com, expirens4.hichina.com, dns7.hichina.com and dns8.hichina.com.
Host names with nine IP numbers: dns10.hichina.com points to 2408:4009:501::18, 39.96.153.41, 39.96.153.51, 47.118.199.201, 47.118.199.211, 120.76.107.41, 120.76.107.51, 139.224.142.111 and 139.224.142.121; dns9.hichina.com points to 2408:4009:501::17, 39.96.153.42, 39.96.153.52, 47.118.199.202, 47.118.199.212, 120.76.107.42, 120.76.107.52, 139.224.142.112 and 139.224.142.122.
Mail Servers
The mail server for coolstudy.com.cn is mx.ym.163.com.
coolstudy.com.cn shares the same mail server setup as other domains, including hsbest.net, xbido.com, v-ma.com, jxyqh.com and sportnanoapi.com.
coolstudy.com.cn shares some mail servers with other domains, including sscdrive.com, 1111home.cn, hnwn.net, gdinsa.org and redhome.cc.
These mail servers are often used with the mail servers mxbiz2.qq.com.
Host name mx.ym.163.com resolves to IP 111.124.200.35.