`htdengineering.vn`

DNSSEC	⚠️ Not signed
A	112.78.2.88^{🇻🇳 ODS-AS-VN112.78.2.0/24 ODSJSC-VN}
NS	`ns1.pavietnam.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	`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	`pro25.emailserver.vn` ⭐
		A	103.110.129.125^{🇻🇳 AXYS-VN103.110.128.0/23}
			PTR	`pro25.emailserver.vn`
TXT	`v=spf1 mx include:emailserver.vn include:spf.protection.outlook.com -all`
SOA	`ns1.pavietnam.vn`hostmaster@htdengineering.vn 2025-12-02 #14

`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=2030751854

Subdomains

www.htdengineering.vn

Same first word

htdengineering.com

htdengineering.vn

DNS History

10 records (6 active, 4 former)

○NSdns15.fpt.vn2018-08-07 → 2018-08-07 · 3 obs

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-05-09 15:10:18

○NSdns16.fpt.vn2018-08-07 → 2018-08-07 · 3 obs

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-05-09 15:10:18

●NSns1.dotvndns.vn2026-05-01 → 2026-05-09 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-05-09 15:10:18

●NSns1.pavietnam.vn2026-05-01 → 2026-05-09 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-05-09 15:10:18

●NSns2.dotvndns.vn2026-05-01 → 2026-05-09 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-05-09 15:10:18

●NSnsbak.dotvndns.com2026-05-01 → 2026-05-09 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-05-09 15:10:18

○MXmail.htdengineering.vn2018-08-07 → 2018-08-07 · 3 obs

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-05-09 15:10:18

●MXpro25.emailserver.vn2026-05-01 → 2026-05-09 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-05-09 15:10:18

○A112.78.2.772018-08-07 → 2018-08-07 · 3 obs

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-05-09 15:10:18

●A112.78.2.882026-05-01 → 2026-05-09 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-05-09 15:10:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	b.dns-servers.vn, a.dns-servers.vn, f.dns-servers.vn, e.dns-servers.vn...	-
htdengineering.vn	nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn	4 records

✅ Authoritative Response

Server:112.213.89.22

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for htdengineering.vn (unsigned zone)

⏱️ Timing

Total: 2048ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`112.78.2.88`
NS	3	`nsbak.dotvndns.com, ns2.dotvndns.vn...`
MX	1	`pro25.emailserver.vn (pri: 10)`
TXT	1	`v=spf1 mx include:emailserver.vn include`
SOA	1	`ns1.pavietnam.vn hostmaster.htdengineeri`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.dotvndns.vn, ns2.dotvndns.vn, ns1.dotvndns.vn...)

Analysis

Hierarchy

The parent of www.htdengineering.vn is htdengineering.vn.

IP Addresses

htdengineering.vn points to a single IP number: 112.78.2.88.

Other host names, for instance vietmychem.com.vn, hoangdieplandscape.com, api.vieltech.vn, noithatchungcu.net.vn and welding.vn share IP numbers with htdengineering.vn.

Name Servers

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

htdengineering.vn shares name servers with other domains at least partially, for instance thegioivisa.vn, ecomwiki.vn, xedulichnhatrang.com, baoxai.com and chipn24.com.