`ducminhcaosu.com`

DNSSEC	⚠️ Not signed
A	165.99.16.178^{MOBIFONE-AS-VN165.99.16.0/23 COMI-VN}
		PTR	`host178.vietazco.com`
NS	`ns1.vietaz.com` ⭐
NS	`ns1.dotvndns.vn`
		A	2406:9c80::66^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns1.dotvndns.vn`
		A	112.213.89.3^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ns1.dotvndns.vn`
NS	`ns2.dotvndns.vn`
		A	2406:9c80::9000:111^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns2.dotvndns.vn`
		A	222.255.121.247^{🇻🇳 VDC222.255.121.0/24 VNPT}
			PTR	`static.vdc.vn`
			PTR	`static.vnpt.vn`
NS	`nsbak.dotvndns.com`
		A	2406:9c80::9000:302^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`nsbak.dotvndns.com`
		A	112.213.89.22^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ns8922.dotvndns.vn`
MX	`mail.ducminhcaosu.com` ⭐
		A	165.99.16.178^{MOBIFONE-AS-VN165.99.16.0/23 COMI-VN}
			PTR	`host178.vietazco.com`
TXT	`v=spf1 a mx ~all`
SOA	`ns1.vietaz.com`hostmaster@ducminhcaosu.com 2026-04-11 #8

`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=1778480076

Subdomains

mail.ducminhcaosu.com

DNS History

11 records (6 active, 5 former)

●NSns1.dotvndns.vn2026-05-11 → 2026-05-11 · 3 obs

○ 2017-05-13 12:03:46
● 2026-05-11 06:31:20
● 2026-05-11 06:31:24

●NSns1.vietaz.com2026-05-11 → 2026-05-11 · 3 obs

○ 2017-05-13 12:03:46
● 2026-05-11 06:31:20
● 2026-05-11 06:31:24

●NSns2.dotvndns.vn2026-05-11 → 2026-05-11 · 3 obs

○ 2017-05-13 12:03:46
● 2026-05-11 06:31:20
● 2026-05-11 06:31:24

○NSns5.vietaz.vn2015-12-12 → 2017-05-13 · 5 obs

○ 2015-08-21 19:17:18
● 2015-12-12 05:55:04
● 2017-05-13 12:03:46
○ 2026-05-11 06:31:20
○ 2026-05-11 06:31:24

○NSns6.vietaz.vn2015-12-12 → 2017-05-13 · 5 obs

○ 2015-08-21 19:17:18
● 2015-12-12 05:55:04
● 2017-05-13 12:03:46
○ 2026-05-11 06:31:20
○ 2026-05-11 06:31:24

●NSnsbak.dotvndns.com2026-05-11 → 2026-05-11 · 3 obs

○ 2017-05-13 12:03:46
● 2026-05-11 06:31:20
● 2026-05-11 06:31:24

○NSvietazco.vietaz.com2015-08-21 → 2015-08-21 · 3 obs

● 2015-08-21 19:17:18
○ 2015-12-12 05:55:04
○ 2026-05-11 06:31:24

●MXmail.ducminhcaosu.com2015-08-21 → 2026-05-11 · 2 obs

● 2015-08-21 19:17:18
● 2026-05-11 06:31:24

○A123.30.108.252015-08-21 → 2015-08-21 · 3 obs

● 2015-08-21 19:17:18
○ 2015-12-12 05:55:04
○ 2026-05-11 06:31:24

●A165.99.16.1782026-05-11 → 2026-05-11 · 3 obs

○ 2017-05-13 12:03:46
● 2026-05-11 06:31:20
● 2026-05-11 06:31:24

○A27.0.12.1422015-12-12 → 2017-05-13 · 5 obs

○ 2015-08-21 19:17:18
● 2015-12-12 05:55:04
● 2017-05-13 12:03:46
○ 2026-05-11 06:31:20
○ 2026-05-11 06:31:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	h.gtld-servers.net, k.gtld-servers.net, d.gtld-servers.net, m.gtld-servers.net...	-
ducminhcaosu.com	nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn	2 records

✅ Authoritative Response

Server:112.213.89.3

NS records: nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ducminhcaosu.com (unsigned zone)

⏱️ Timing

Total: 1610ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`165.99.16.178`
NS	3	`ns1.dotvndns.vn, ns2.dotvndns.vn...`
MX	1	`mail.ducminhcaosu.com (pri: 0)`
TXT	1	`v=spf1 a mx ~all`
SOA	1	`ns1.vietaz.com hostmaster.ducminhcaosu.c`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (nsbak.dotvndns.com, nsbak.dotvndns.com)

Analysis

Hierarchy

ducminhcaosu.com is a parent of mail.ducminhcaosu.com.

IP Addresses

ducminhcaosu.com points to a single IP address: 165.99.16.178.

Other host names such as e68f77c4-2c64-40aa-a4f3-a47e08b12941.thuviendulichsaigon.edu.vn, anlocphat.com.vn, host178.vietazco.com, thuviendulichsaigon.edu.vn and mail.thienthanhphatplastic.vn share IP numbers with ducminhcaosu.com.

Name Servers

ducminhcaosu.com is delegated to four name servers: nsbak.dotvndns.com, ns1.vietaz.com, ns1.dotvndns.vn and ns2.dotvndns.vn.

At least part of the name servers for ducminhcaosu.com are shared with other domains, for instance catam.vn, bkmec.com, dutus.net, kinhmat.vn and bangkeovanphong.com.

These name servers are often used together with the name servers ns1.pavietnam.vn, ns3.dotvndns.vn, ns2.pavietnam.vn, nsbak.pavietnam.net, ns4.dotvndns.vn, nsbak.dotvndns.vn and ns1.nina.vn.

Host names with two IP numbers:

nsbak.dotvndns.com points to 2406:9c80::9000:302 and 112.213.89.22

ns1.dotvndns.vn points to 2406:9c80::66 and 112.213.89.3

ns2.dotvndns.vn points to 2406:9c80::9000:111 and 222.255.121.247

Mail Servers

The mail server for ducminhcaosu.com is mail.ducminhcaosu.com.

Host mail.ducminhcaosu.com points to IP 165.99.16.178.

ducminhcaosu.com - robtex.com