course01.cn - robtex.com
course01.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 39.108.186.86🇨🇳 Alibaba-Cloud39.108.128.0/17 | ||||||
| NS | dns11.hichina.com ⭐ | ||||||
| A | 2408:4009:501::19🇨🇳 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 | dns12.hichina.com | ||||||
| A | 2408:4009:501::20🇨🇳 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, | ||||||
| SOA | dns11.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=2034789637 | ||||||
Same first word
Similar names
DNS History
3 records (3 active, 0 former)
●NSdns11.hichina.com2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 03:00:34
●NSdns12.hichina.com2026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 03:00:34
●A39.108.186.862026-04-27 → 2026-05-14 · 2 obs
● 2026-05-14 03:00:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| course01.cn | dns11.hichina.com, dns12.hichina.com | - |
✅ Authoritative Response
Server:139.224.142.122
NS records: dns11.hichina.com, dns12.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for course01.cn (unsigned zone)
⏱️ Timing
Total: 1649ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 39.108.186.86 |
| NS | 2 | dns12.hichina.com, dns11.hichina.com |
| SOA | 1 | dns11.hichina.com hostmaster.hichina.com |
Analysis
IP Addresses
course01.cn resolves to a single IP: 39.108.186.86.
Other host names, for instance course01.com, course01.net, chaojizb.net, chaojizb.com and yunmye.com share IP numbers with course01.cn.
Name Servers
course01.cn has two name servers: dns11.hichina.com and dns12.hichina.com.
course01.cn shares the same name server setup as other domains, for example alrazi.cc, 3tiworld.com, taivos.com, maxfelvape.com and destoken.com.
course01.cn shares some name servers with other domains, for instance hotmaill.cn, ldg8.com and inforcube.com.
These name servers are commonly used together with expirens3.hichina.com and expirens4.hichina.com.
Host names with nine IP numbers:
dns11.hichina.com points to 2408:4009:501::19, 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.
dns12.hichina.com points to 2408:4009:501::20, 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.