letstudy.edu.vn - robtex.com
letstudy.edu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 123.30.129.229🇻🇳 VDC123.30.129.0/24 VNPT | ||||||
| PTR | mail.hoangtamonline.com | ||||||
| PTR | missil.desucof.org | ||||||
| PTR | mail.mintcosmetics.vn | ||||||
| NS | ns3.vinahost.vn ⭐ ⚠️ Not in zone NS records | ||||||
| A | 125.212.217.199🇻🇳 VIETEL-AS-AP125.212.208.0/20 VIETTEL-VN | ||||||
| NS | ns4.vinahost.vn ⚠️ Not in zone NS records | ||||||
| A | 123.30.139.119🇻🇳 VDC123.30.138.0/23 VNPT | ||||||
| PTR | static.vnpt.vn | ||||||
| SOA | ns3.vinahost.vnhostmaster@vinahost.vn 2025-10-03 #2 | ||||||
edu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns-master.vnnic.vn ⭐ | ||||||
| NS | a.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | b.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | c.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | d.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | e.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | f.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | g.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| NS | h.dns-servers.vn ⚠️ Not in parent delegation | ||||||
| SOA | dns-master.vnnic.vnpostmaster@vnnic.vn serial=2018564758 | ||||||
Subdomains
Same first word
DNS History
3 records (3 active, 0 former)
●NSns3.vinahost.vn2026-04-30 → 2026-05-10 · 5 obs
● 2026-05-01 14:23:42
○ 2026-05-01 15:01:02
● 2026-05-01 15:49:30
● 2026-05-10 02:35:38
●NSns4.vinahost.vn2026-04-30 → 2026-05-10 · 5 obs
● 2026-05-01 14:23:42
○ 2026-05-01 15:01:02
● 2026-05-01 15:49:30
● 2026-05-10 02:35:38
●A123.30.129.2292026-04-30 → 2026-05-10 · 5 obs
● 2026-05-01 14:23:42
○ 2026-05-01 15:01:02
● 2026-05-01 15:49:30
● 2026-05-10 02:35:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn... | - |
| letstudy.edu.vn | ns3.vinahost.vn, ns4.vinahost.vn | - |
✅ Authoritative Response
Server:123.30.139.119
NS records: ns3.vinahost.vn, ns4.vinahost.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for letstudy.edu.vn (unsigned zone)
⏱️ Timing
Total: 1917ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 123.30.129.229 |
| SOA | 1 | ns3.vinahost.vn hostmaster.vinahost.vn |
Analysis
Hierarchy
letstudy.edu.vn is a parent of app.letstudy.edu.vn and n8n.letstudy.edu.vn.
IP Addresses
letstudy.edu.vn points to a single IP number: 123.30.129.229.
Other host names, for instance doanson.n8ntool.io.vn, maplepham.click, n8n.letstudy.edu.vn, www.qhon.com.vn and 123farm.n8nsolutions.io.vn share IP numbers with letstudy.edu.vn.
Name Servers
letstudy.edu.vn is delegated to two name servers: ns3.vinahost.vn and ns4.vinahost.vn.
letstudy.edu.vn uses the same name server setup as other domains, for instance yareah.id.vn, marybook.vn, squadroni.com.vn, qqdesigner.id.vn and yennuitayninh.vn.
letstudy.edu.vn shares name servers with other domains at least partially, for instance chuyenluongthevinh.edu.vn, ibp.vn, vietphat.com.vn, politek.com.vn and techplus.com.vn.
these name servers are commonly used together with dns3.vina-host.com and dns4.vina-host.com.
Host names with one IP number:
ns3.vinahost.vn points to: 125.212.217.199.
ns4.vinahost.vn points to: 123.30.139.119.