`dev.tailieu.vn`

DNSSEC	⚠️ Not signed
A	222.255.121.244^{🇻🇳 VDC222.255.121.0/24 VNPT}
		PTR	`static.vdc.vn`
		PTR	`static.vnpt.vn`

`tailieu.vn`

	DNSSEC	⚠️ Not signed
	A	14.225.236.180^{🇻🇳 VNPT-AS-VN14.225.236.0/24 VNPT}
	NS	`ns.tailieu.vn` ⭐
	NS	`ns1.vdoc.com.vn`
	NS	`ns2.vdoc.com.vn`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
	MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
	MX	`aspmx2.googlemail.com`⁽³⁰⁾
	MX	`aspmx3.googlemail.com`⁽³⁰⁾
	MX	`aspmx4.googlemail.com`⁽³⁰⁾
	MX	`aspmx5.googlemail.com`⁽³⁰⁾
	TXT	`google-site-verification=CigMfjBwUYKGFLUpFMNLvuDdgu8DI7PI_AltwS14E44`
	TXT	`v=spf1 include:_spf.google.com ~all`
	TXT	`_s5s9th55fh7x0ze4ye4nho74h4qir8n`
	SOA	`ns.tailieu.vn`webmaster@tailieu.vn serial=111111253

WOT: SAFE (84/100)
rank #213935 globally
rank #463 in the tld
WOT: SAFE (84/100)
📈 Tranco rank: #106,287

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DNS History

1 record (1 active, 0 former)

●A222.255.121.2442026-05-01 → 2026-05-11 · 2 obs

● 2026-05-01 16:36:04
● 2026-05-11 08:00:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	b.dns-servers.vn, g.dns-servers.vn, d.dns-servers.vn, c.dns-servers.vn...	-
tailieu.vn	ns1.vdoc.com.vn, ns2.vdoc.com.vn	-

✅ Authoritative Response

Server:14.225.236.180

NS records: ns1.vdoc.com.vn, ns2.vdoc.com.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tailieu.vn (unsigned zone)

⏱️ Timing

Total: 4223ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`222.255.121.244`

Analysis

IP Addresses

dev.tailieu.vn resolves to a single IP address: 222.255.121.244.

Other host names including hoc247.vn, hoc247.net, elib.vn, www.hoc247.net and static.hoc247.net share IP numbers with dev.tailieu.vn.

dev.tailieu.vn - robtex.com

dev.tailieu.vn

tailieu.vn