`downloadtailieu.com`

DNSSEC	⚠️ Not signed
A	103.75.186.15^{🇻🇳 VNPT-AS-VN103.75.184.0/22 Inet software one member company limited INETSOFT-VN}
NS	`ns-master.inet.vn` ⭐
		A	202.92.4.8^{🇻🇳 VNPT-AS-VN202.92.4.0/22 INET-VN}
NS	`ns1.inet.vn`
		A	2001:df7:ce00:1::7^{🇻🇳 VNPT-AS-VN2001:df7:ce00::/48 INETSOFT-VN Inet software one member company limited}
		A	202.92.4.25^{🇻🇳 VNPT-AS-VN202.92.4.0/22 INET-VN}
NS	`ns2.inet.vn`
		A	2401:5f80:2001:4::30^{🇻🇳 VTDC-AS-VN2401:5f80:2000::/36 VTDC-VN}
		A	210.211.99.38^{🇻🇳 VTDC-AS-VN210.211.99.0/24 Proxy-registered route object}
NS	`ns3.inet.vn`
		A	2401:5f80:4001:4::14^{🇻🇳 VTDC-AS-VN2401:5f80:4000::/36 VTDC-VN}
		A	203.113.174.42^{🇻🇳 VTDC-AS-VN203.113.174.0/23 VIETTEL-VN}
SOA	`ns-master.inet.vn`postmaster@inet.vn 2015-07-28 #0

`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.net`nstld@verisign-grs.com serial=1778343891

Same first word

downloadtailieu.com

DNS History

6 records (5 active, 1 former)

●NSns-master.inet.vn2026-05-01 → 2026-05-09 · 2 obs

● 2026-05-01 11:43:42
● 2026-05-09 16:54:46

●NSns1.inet.vn2026-05-01 → 2026-05-09 · 2 obs

● 2026-05-01 11:43:42
● 2026-05-09 16:54:46

●NSns2.inet.vn2026-05-01 → 2026-05-09 · 2 obs

● 2026-05-01 11:43:42
● 2026-05-09 16:54:46

●NSns3.inet.vn2026-05-01 → 2026-05-09 · 2 obs

● 2026-05-01 11:43:42
● 2026-05-09 16:54:46

●A103.75.186.152026-05-01 → 2026-05-09 · 3 obs

○ 2018-09-21 20:48:04
● 2026-05-01 11:43:42
● 2026-05-09 16:54:46

○A74.220.199.82015-08-13 → 2018-09-21 · 4 obs

● 2015-08-13 01:30:04
● 2018-09-21 20:48:04
○ 2026-05-01 11:43:42
○ 2026-05-09 16:54:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, d.gtld-servers.net, h.gtld-servers.net, f.gtld-servers.net...	-
downloadtailieu.com	ns1.inet.vn, ns2.inet.vn, ns3.inet.vn	-

✅ Authoritative Response

Server:203.113.174.42

NS records: ns1.inet.vn, ns2.inet.vn, ns3.inet.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for downloadtailieu.com (unsigned zone)

⏱️ Timing

Total: 2840ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.75.186.15`
NS	3	`ns3.inet.vn, ns2.inet.vn...`
SOA	1	`ns-master.inet.vn postmaster.inet.vn`

Analysis

IP Addresses

downloadtailieu.com points to IP number 103.75.186.15.

For instance, other host names thcstrungvuongxl.edu.vn, tmqsolution.vn, hn.donghovip.vn, alfimex.com.vn and tuongphatquanam.vn share IP numbers with downloadtailieu.com.

Name Servers

downloadtailieu.com is delegated to four name servers: ns-master.inet.vn, ns1.inet.vn, ns2.inet.vn and ns3.inet.vn.

downloadtailieu.com shares name servers with other domains at least partially, for example sportgd.com.vn, muachung.vn, invenco.com.vn, hncorporationltd.com and iland.vn.

These name servers are commonly used with the name servers ns1.it.vn and ns2.it.vn.

Hosts with two IP numbers

- Host ns1.inet.vn points to: 2001:df7:ce00:1::7 and 202.92.4.25

- Host ns2.inet.vn points to: 2401:5f80:2001:4::30 and 210.211.99.38

- Host ns3.inet.vn points to: 2401:5f80:4001:4::14 and 203.113.174.42

Hosts with one IP number

- Host ns-master.inet.vn points to: 202.92.4.8

downloadtailieu.com - robtex.com