sjtudb.tech - robtex.com
sjtudb.tech
| DNSSEC | ⚠️ Not signed | ||||||
| A | 185.244.195.136🇩🇪 netcup-AS185.244.192.0/22 | ||||||
| PTR | mail.sjtudb.tech | ||||||
| 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, | ||||||
| MX | sjtudb.tech ⭐ | ||||||
| A | 185.244.195.136🇩🇪 netcup-AS185.244.192.0/22 | ||||||
| PTR | mail.sjtudb.tech | ||||||
| TXT | v=spf1 mx -all | ||||||
| SOA | dns11.hichina.comhostmaster@hichina.com 2026-01-09 #13 | ||||||
tech
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns01.trs-dns.com ⭐ | ||||||
| NS | ns.trs-dns.com | ||||||
| NS | ns01.trs-dns.net | ||||||
| NS | ns10.trs-dns.info | ||||||
| NS | ns10.trs-dns.org | ||||||
| SOA | ns.trs-dns.comtrs-ops@tucows.com serial=1774378745 | ||||||
MX for
Subdomains
mail.sjtudb.tech |
Same first word
sjtudb.tech |
Similar names
DNS History
4 records (4 active, 0 former)
●NSdns11.hichina.com2026-03-19 → 2026-03-24 · 2 obs
● 2026-03-24 19:24:06
●NSdns12.hichina.com2026-03-19 → 2026-03-24 · 2 obs
● 2026-03-24 19:24:06
●MXsjtudb.tech2026-03-19 → 2026-03-24 · 2 obs
● 2026-03-24 19:24:06
●A185.244.195.1362026-03-19 → 2026-03-24 · 2 obs
● 2026-03-24 19:24:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tech | ns01.trs-dns.com, ns10.trs-dns.org, ns10.trs-dns.info, ns01.trs-dns.net | 8 records |
| sjtudb.tech | dns11.hichina.com, dns12.hichina.com | - |
✅ Authoritative Response
Server:120.76.107.52
NS records: dns11.hichina.com, dns12.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sjtudb.tech (unsigned zone)
⏱️ Timing
Total: 1356ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.244.195.136 |
| NS | 2 | dns11.hichina.com, dns12.hichina.com |
| MX | 1 | sjtudb.tech (pri: 10) |
| TXT | 1 | v=spf1 mx -all |
| SOA | 1 | dns11.hichina.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 8
Out-of-bailiwick: 8 (ns01.trs-dns.com, ns01.trs-dns.com, ns10.trs-dns.org...)
Analysis
Hierarchy
sjtudb.tech is the parent of mail.sjtudb.tech.
Mail Server Role
sjtudb.tech acts as the mail server for sjtudb.tech and mail.sjtudb.tech.
IP Addresses
sjtudb.tech resolves to a single IP address: 185.244.195.136.
Name Servers
sjtudb.tech's delegation uses two name servers, dns11.hichina.com and dns12.hichina.com.
sjtudb.tech shares the same name server setup as other domains, for example alllandsteelpipe.com, ntsj.js.cn, qqmo.net, junzhenggroup.net and ruplc.com.
sjtudb.tech partially shares its name servers with other domains, for example zmdzsw.com and abica.cn.
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.
Mail Servers
A single mail server handles sjtudb.tech.
sjtudb.tech uses the same mail server setup as other domains, such as mail.sjtudb.tech.
sjtudb.tech points to a single IP: 185.244.195.136.