thecoursof.com - robtex.com
thecoursof.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.18.3.157Cloudflare104.18.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | dns23.hichina.com ⭐ | ||||||
| A | 2408:4009:501::31🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.40🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.60🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.200🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.220🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.40🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.60🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.100🇨🇳 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 | 139.224.142.110🇨🇳 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 | dns24.hichina.com | ||||||
| A | 2408:4009:501::32🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.38🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.61🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.198🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.222🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.38🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.61🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.98🇨🇳 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 | 139.224.142.108🇨🇳 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 | mail.thecoursof.com ⭐ | ||||||
| A | 47.254.92.90🇺🇸 Alibaba-Cloud47.254.64.0/18 Proxy-registered route object | ||||||
| PTR | ninisilk.com | ||||||
| PTR | new.showcloud.top | ||||||
| TXT | v=spf1 ip4:47.254.92.90~all | ||||||
| SOA | dns23.hichina.comhostmaster@hichina.com 2026-01-09 #13 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774365702 | ||||||
Same first word
thecoursof.com |
Similar names
DNS History
4 records (4 active, 0 former)
●NSdns23.hichina.com2026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 15:46:38
●NSdns24.hichina.com2026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 15:46:38
●MXmail.thecoursof.com2026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 15:46:38
●A104.18.3.1572026-03-24 → 2026-03-24 · 2 obs
● 2026-03-24 15:46:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | m.gtld-servers.net, h.gtld-servers.net, f.gtld-servers.net, d.gtld-servers.net... | - |
| thecoursof.com | dns23.hichina.com, dns24.hichina.com | 18 records |
✅ Authoritative Response
Server:120.76.107.40
NS records: dns23.hichina.com, dns24.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for thecoursof.com (unsigned zone)
⏱️ Timing
Total: 3725ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 104.18.3.157 |
| NS | 2 | dns23.hichina.com, dns24.hichina.com |
| MX | 1 | mail.thecoursof.com (pri: 1) |
| TXT | 1 | v=spf1 ip4:47.254.92.90~all |
| SOA | 1 | dns23.hichina.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 18
Out-of-bailiwick: 18 (dns23.hichina.com, dns23.hichina.com, dns23.hichina.com...)
Analysis
IP Addresses
thecoursof.com resolves to one IP number: 104.18.3.157.
other host names including www.nurnbergs.de, egoryspecies.com, triflehull.com, pertalriodic.com and registerk.com share IP numbers with thecoursof.com.
Name Servers
thecoursof.com is delegated to two name servers dns23.hichina.com and dns24.hichina.com.
thecoursof.com shares the same name server setup as other domains, for instance zy.com.cn, vsan.cn, laidafen.com, aimaboshi.com and royalcorp.cn.
thecoursof.com at least partially shares name servers with other domains, for instance 31a.org, go-bo.cn, sysc.cn, w-x-s.com and diershoubing.com.
these name servers are often used together with ns1.alidns.com, ns2.alidns.com, expirens3.hichina.com and expirens4.hichina.com.
Host names with nine IP numbers:
dns23.hichina.com points to: 2408:4009:501::31, 39.96.153.40, 39.96.153.60, 47.118.199.200, 47.118.199.220, 120.76.107.40, 120.76.107.60, 139.224.142.100 and 139.224.142.110.
dns24.hichina.com points to: 2408:4009:501::32, 39.96.153.38, 39.96.153.61, 47.118.199.198, 47.118.199.222, 120.76.107.38, 120.76.107.61, 139.224.142.98 and 139.224.142.108.
Mail Servers
thecoursof.com is handled by a single mail server, mail.thecoursof.com.
mail.thecoursof.com resolves to IP 47.254.92.90.