null.college - robtex.com
null.college
| DNSSEC | ⚠️ Not signed | ||||||
| A | 38.47.213.18🇺🇸 HKCICL-AS-AP38.47.213.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| 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, | ||||||
| SOA | dns23.hichina.comhostmaster@hichina.com 2026-01-09 #13 | ||||||
college
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns0.centralnic.net ⭐ | ||||||
| NS | a.nic.college | ||||||
| NS | b.nic.college | ||||||
| NS | c.nic.college | ||||||
| NS | d.nic.college | ||||||
| SOA | ns0.centralnic.nethostmaster@centralnic.net serial=3000459791 | ||||||
Subdomains
sso.null.college |
Same first word
Similar names
DNS History
3 records (3 active, 0 former)
●NSdns23.hichina.com2026-05-10 → 2026-05-10 · 2 obs
● 2026-05-10 22:38:08
●NSdns24.hichina.com2026-05-10 → 2026-05-10 · 2 obs
● 2026-05-10 22:38:08
●A38.47.213.182026-05-10 → 2026-05-10 · 2 obs
● 2026-05-10 22:38:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| college | a.nic.college, b.nic.college, c.nic.college, d.nic.college | 8 records |
| null.college | dns24.hichina.com, dns23.hichina.com | - |
✅ Authoritative Response
Server:39.96.153.38
NS records: dns24.hichina.com, dns23.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for null.college (unsigned zone)
⏱️ Timing
Total: 1555ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 38.47.213.18 |
| NS | 2 | dns24.hichina.com, dns23.hichina.com |
| SOA | 1 | dns23.hichina.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 8
In-bailiwick: 8 (a.nic.college, a.nic.college, b.nic.college...)
Analysis
Hierarchy
The parent of sso.null.college is null.college.
IP Addresses
null.college points to a single IP address: 38.47.213.18.
Other host names, for instance sso.null.college, share IP numbers with null.college.
Name Servers
Two name servers dns23.hichina.com and dns24.hichina.com handle the delegation for null.college.
null.college shares the same name server setup as other domains, for example cqjizhou.com, iwsoft.net, zdyd.com, fayuns.cn and onala.com.
null.college at least partially shares name servers with other domains, for example shenmolu.com, zh404.cn, flaxmakerswim.com, souid.com and lyf520.xyz.
These name servers are often used together with 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.