`caothu.vn`

DNSSEC	⚠️ Not signed
A	103.28.36.216^{🇻🇳 NHAN-HOA-AS-VN103.28.36.0/22 NHANHOA-VN}
		PTR	`share-dedi11.nhanhoa.com`
NS	`ns1.zonedns.vn` ⭐
		A	2401:c080:1400:1cd4:5400:5ff:fe80:ec33^{🇸🇬 AS-VULTR2401:c080:1400::/38 Vultr Assigned Prefix}
		A	64.176.84.220^{🇸🇬 AS-VULTR64.176.80.0/20 Vultr Assigned Prefix}
			PTR	`ns1.zonedns.vn`
NS	`ns2.zonedns.vn`
		A	2401:c080:1400:1cd4:5400:5ff:fe80:ec33^{🇸🇬 AS-VULTR2401:c080:1400::/38 Vultr Assigned Prefix}
		A	103.176.178.51^{🇻🇳 NHAN-HOA-AS-VN103.176.178.0/24 NINETECH-VN}
NS	`ns3.zonedns.vn`
		A	2001:df1:3200::15^{🇻🇳 NHAN-HOA-AS-VN2001:df1:3200::/48 NHANHOA-VN}
		A	103.28.36.30^{🇻🇳 NHAN-HOA-AS-VN103.28.36.0/22 NHANHOA-VN}
NS	`ns4.zonedns.vn`
		A	2001:df1:3200::15^{🇻🇳 NHAN-HOA-AS-VN2001:df1:3200::/48 NHANHOA-VN}
		A	103.28.39.159^{🇻🇳 NHAN-HOA-AS-VN103.28.36.0/22 NHANHOA-VN}
SOA	`ns1.zonedns.vn`root@caothu.vn 2026-02-01 #7

`vn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`dns-master.vnnic.vn` ⭐
	NS	`a.dns-servers.vn`
	NS	`b.dns-servers.vn`
	NS	`c.dns-servers.vn`
	NS	`d.dns-servers.vn`
	NS	`e.dns-servers.vn`
	NS	`f.dns-servers.vn`
	NS	`g.dns-servers.vn`
	NS	`h.dns-servers.vn`
	SOA	`dns-master.vnnic.vn`postmaster@vnnic.vn serial=2030750063

Same first word

caothu.vn

caothu.net

caothu.com

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DNS History

13 records (5 active, 8 former)

○NSdionysus2015-05-19 → 2015-05-19 · 3 obs

● 2015-05-19 17:41:38
○ 2015-10-18 13:48:56
○ 2026-05-09 00:00:10

○NSjessica.ns.cloudflare.com2015-10-18 → 2016-05-18 · 5 obs

○ 2015-05-19 17:41:38
● 2015-10-18 13:48:56
● 2016-05-18 18:54:50
○ 2016-09-30 03:56:00
○ 2026-05-09 00:00:10

●NSns1.zonedns.vn2016-09-30 → 2026-05-09 · 3 obs

○ 2016-05-18 18:54:50
● 2016-09-30 03:56:00
● 2026-05-09 00:00:10

●NSns2.zonedns.vn2016-09-30 → 2026-05-09 · 3 obs

○ 2016-05-18 18:54:50
● 2016-09-30 03:56:00
● 2026-05-09 00:00:10

●NSns3.zonedns.vn2016-09-30 → 2026-05-09 · 3 obs

○ 2016-05-18 18:54:50
● 2016-09-30 03:56:00
● 2026-05-09 00:00:10

●NSns4.zonedns.vn2016-09-30 → 2026-05-09 · 3 obs

○ 2016-05-18 18:54:50
● 2016-09-30 03:56:00
● 2026-05-09 00:00:10

○NSrudy.ns.cloudflare.com2015-10-18 → 2016-05-18 · 5 obs

○ 2015-05-19 17:41:38
● 2015-10-18 13:48:56
● 2016-05-18 18:54:50
○ 2016-09-30 03:56:00
○ 2026-05-09 00:00:10

○MXmail.caothu.vn2015-10-18 → 2016-05-18 · 4 obs

● 2015-10-18 13:48:56
● 2016-05-18 18:54:50
○ 2016-09-30 03:56:00
○ 2026-05-09 00:00:10

●A103.28.36.2162026-04-09 → 2026-05-09 · 3 obs

○ 2017-03-27 07:03:36
● 2026-04-09 19:40:34
● 2026-05-09 00:00:10

○A103.28.36.942016-09-30 → 2017-03-27 · 5 obs

○ 2016-05-18 18:54:50
● 2016-09-30 03:56:00
● 2017-03-27 07:03:36
○ 2026-04-09 19:40:34
○ 2026-05-09 00:00:10

○A104.31.84.242015-10-18 → 2016-05-18 · 5 obs

○ 2015-05-19 17:41:38
● 2015-10-18 13:48:56
● 2016-05-18 18:54:50
○ 2016-09-30 03:56:00
○ 2026-05-09 00:00:10

○A104.31.85.242015-10-18 → 2016-05-18 · 5 obs

○ 2015-05-19 17:41:38
● 2015-10-18 13:48:56
● 2016-05-18 18:54:50
○ 2016-09-30 03:56:00
○ 2026-05-09 00:00:10

○A120.72.103.1472015-05-19 → 2015-05-19 · 3 obs

● 2015-05-19 17:41:38
○ 2015-10-18 13:48:56
○ 2026-05-09 00:00:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...	-
caothu.vn	ns4.zonedns.vn, ns3.zonedns.vn, ns1.zonedns.vn, ns2.zonedns.vn	-

✅ Authoritative Response

Server:103.28.39.159

NS records: ns4.zonedns.vn, ns3.zonedns.vn, ns1.zonedns.vn, ns2.zonedns.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for caothu.vn (unsigned zone)

⏱️ Timing

Total: 2378ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.28.36.216`
NS	4	`ns4.zonedns.vn, ns3.zonedns.vn...`
SOA	1	`ns1.zonedns.vn root.caothu.vn`

Analysis

IP Addresses

caothu.vn resolves to one IP number: 103.28.36.216.

other host names including test.ttytdongvan.org.vn, bb.ccc.dddd.root.nhaxuatbannghean.gov.vn, ilmninnqjdzroujh.chicucqlclnghean.gov.vn, cpcontacts.chicucthuysannghean.gov.vn and webdisk.nhaxuatbannghean.gov.vn share IP numbers with caothu.vn.

Name Servers

caothu.vn is delegated to four name servers: ns1.zonedns.vn, ns2.zonedns.vn, ns3.zonedns.vn and ns4.zonedns.vn.

caothu.vn at least partially shares name servers with other domains, for instance mercedesbenzhanoi.net, xichlip.com, tholichsu.com, homestaythainguyen.io.vn and sangochienphat.vn.

these name servers are commonly used alongside ns1.bazan.vn.

Hostnames with two IP numbers:

Host ns1.zonedns.vn points to: 2401:c080:1400:1cd4:5400:5ff:fe80:ec33 and 64.176.84.220.

Host ns2.zonedns.vn points to: 2401:c080:1400:1cd4:5400:5ff:fe80:ec33 and 103.176.178.51.

Host ns3.zonedns.vn points to: 2001:df1:3200::15 and 103.28.36.30.

Host ns4.zonedns.vn points to: 2001:df1:3200::15 and 103.28.39.159.

Names pointing to 2401:c080:1400:1cd4:5400:5ff:fe80:ec33: ns1.zonedns.vn and ns2.zonedns.vn.

Names pointing to 2001:df1:3200::15: ns3.zonedns.vn and ns4.zonedns.vn.

caothu.vn - robtex.com

caothu.vn

vn

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`caothu.vn`

`vn`