htdengineering.vn - dns.ninja

`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 #13

`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=2031037404

Subdomains

mail.htdengineering.vn

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
○ 2026-07-25 16:38:36

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

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-07-25 16:38:36

●NSns1.dotvndns.vn2026-05-01 → 2026-07-25 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-07-25 16:38:36

●NSns1.pavietnam.vn2026-05-01 → 2026-07-25 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-07-25 16:38:36

●NSns2.dotvndns.vn2026-05-01 → 2026-07-25 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-07-25 16:38:36

●NSnsbak.dotvndns.com2026-05-01 → 2026-07-25 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-07-25 16:38:36

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

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-07-25 16:38:36

●MXpro25.emailserver.vn2026-05-01 → 2026-07-25 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-07-25 16:38:36

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

● 2018-08-07 09:56:12
○ 2026-05-01 12:47:46
○ 2026-07-25 16:38:36

●A112.78.2.882026-05-01 → 2026-07-25 · 3 obs

○ 2018-08-07 09:56:12
● 2026-05-01 12:47:46
● 2026-07-25 16:38:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.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: 2591ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`112.78.2.88`
NS	3	`ns1.dotvndns.vn, 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 domain of mail.htdengineering.vn and www.htdengineering.vn is htdengineering.vn.

IP Addresses

htdengineering.vn directs to one IP number, which is 112.78.2.88.

Among the host names that share IP numbers with htdengineering.vn are vietmychem.com.vn, hoangdieplandscape.com, api.vieltech.vn and two others.

Name Servers

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

The name servers of htdengineering.vn overlap at least partially with those of other domains — among them visacanada.net.vn, thegioivisa.vn, ecomwiki.vn and two more.

These name servers commonly co-occur with the name servers ns2.pavietnam.vn, nsbak.pavietnam.net, ns3.dotvndns.vn and nsbak.dotvndns.vn.

nsbak.dotvndns.com directs to 112.213.89.22 and 2406:9c80::9000:302. ns1.dotvndns.vn directs to 112.213.89.3 and 2406:9c80::66. ns2.dotvndns.vn directs to 222.255.121.247 and 2406:9c80::9000:111. ns1.pavietnam.vn directs to 112.213.89.3 and 2406:9c80::66. All four hosts carry two IP addresses each; ns1.dotvndns.vn and ns1.pavietnam.vn resolve to the same two.

Host names pointing to 2406:9c80::66 IP addresses: ns1.dotvndns.vn and ns1.pavietnam.vn.

Host names pointing to 112.213.89.3 IP addresses: ns1.dotvndns.vn and ns1.pavietnam.vn.

Mail Servers

htdengineering.vn routes its mail through a single mail server, pro25.emailserver.vn.

htdengineering.vn has the same mail server arrangement as a number of other domains, for example thueton.vn, universallogistics.vn, nguyencongpc.vn and two more.

The mail servers for htdengineering.vn overlap at least partially with those of other domains, including cailayvetco.com and dienlanhnamviet.vn.

pro25.emailserver.vn has exactly one IP number: 103.110.129.125.