idubook.cn - robtex.com
idubook.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 216.198.79.1🇺🇸 Amazon216.198.79.0/24 EC2 Prefix | ||||||
| NS | dns1.hichina.com ⭐ | ||||||
| A | 2408:4009:501::9🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.43🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.63🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.203🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.213🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.43🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.63🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.113🇨🇳 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 | 139.224.142.123🇨🇳 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 | dns2.hichina.com | ||||||
| A | 2408:4009:501::10🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.44🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.54🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.204🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.214🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.44🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.54🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.114🇨🇳 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 | 139.224.142.124🇨🇳 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 | dns1.hichina.comhostmaster@hichina.com 2026-01-12 #9 | ||||||
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=2035158543 | ||||||
Same first word
idubook.cn |
Similar names
DNS History
5 records (5 active, 0 former)
●NSdns1.hichina.com2026-06-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:32:12
●NSdns2.hichina.com2026-06-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:32:12
●A216.198.79.12026-06-04 → 2026-08-09 · 2 obs
● 2026-08-09 07:32:12
🔍 DNS Trace
Analysis
IP Addresses
idubook.cn points to a single IP number: 216.198.79.1.
Additional host names — runblob.io, dapurinsight.asia, olalachess.com and two others — share IP numbers with idubook.cn.
Name Servers
idubook.cn is served by two delegated name servers, dns1.hichina.com and dns2.hichina.com.
idubook.cn shares its name server setup with other domains, including jlcn.com.cn, dragonfly.net.cn, tangbang.net and two others.
idubook.cn has at least partial name server overlap with other domains, such as debyem.com, momofo.com, fjzz.org and two others.
It is common to find these name servers paired with the name servers expirens3.hichina.com, expirens4.hichina.com, ns1.alidns.com and ns2.alidns.com.
Host names with 9 IP numbers:
dns1.hichina.com carries IP addresses 39.96.153.43, 39.96.153.63 and 47.118.199.203, with 6 other addresses beyond those.
dns2.hichina.com carries IP addresses 39.96.153.44, 39.96.153.54 and 47.118.199.204, with 6 other addresses beyond those.
Mail Servers
idubook.cn has two mail servers: mxbiz1.qq.com and mxbiz2.qq.com.
idubook.cn shares the same mail server setup as other domains, including caestudio.com, singse.com, sundomedia.com.cn and two others.
At least some of idubook.cn's mail servers are shared with other domains, among them chinacti.cn, freesat.cn, gzno.com and yinghecloud.com.