`duykhoa.net`

DNSSEC	⚠️ Not signed
A	171.244.35.243^{🇻🇳 VTDC-AS-VN171.244.32.0/22 Proxy-registered route object}
NS	`ns1.pavietnam.vn` ⭐ ⚠️ Not in zone NS records
		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` ⚠️ Not in parent delegation
		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` ⚠️ Not in parent delegation
		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	`ns2.pavietnam.vn` ⚠️ Not in zone NS records
		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.pavietnam.net` ⚠️ Not in zone NS records
		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`
SOA	`ns1.pavietnam.vn`hostmaster@duykhoa.net 2025-07-23 #1

`net`

	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=1778543111

Same first word

duykhoa.net

DNS History

6 records (6 active, 0 former)

●NSns1.dotvndns.vn2026-02-18 → 2026-05-12 · 6 obs

● 2026-02-18 12:55:58
● 2026-05-01 01:55:18
○ 2026-05-01 02:26:14
○ 2026-05-01 03:51:26
● 2026-05-01 05:02:10
● 2026-05-12 00:06:38

●NSns1.pavietnam.vn2026-02-18 → 2026-05-12 · 2 obs

● 2026-02-18 12:55:58
● 2026-05-12 00:06:38

●NSns2.dotvndns.vn2026-02-18 → 2026-05-12 · 14 obs

● 2026-02-18 12:55:58
● 2026-04-30 19:45:30
○ 2026-04-30 22:50:54
● 2026-04-30 23:24:02
● 2026-04-30 23:54:48
○ 2026-05-01 01:24:56
● 2026-05-01 01:55:18
○ 2026-05-01 02:26:14
○ 2026-05-01 03:51:26
● 2026-05-01 05:02:10
● 2026-05-06 21:56:58
○ 2026-05-10 22:04:50
● 2026-05-12 00:06:34
● 2026-05-12 00:06:38

●NSns2.pavietnam.vn2026-02-18 → 2026-05-12 · 2 obs

● 2026-02-18 12:55:58
● 2026-05-12 00:06:38

●NSnsbak.pavietnam.net2026-02-18 → 2026-05-12 · 2 obs

● 2026-02-18 12:55:58
● 2026-05-12 00:06:38

●A171.244.35.2432026-02-18 → 2026-05-12 · 2 obs

● 2026-02-18 12:55:58
● 2026-05-12 00:06:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
duykhoa.net	nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn	2 records

✅ Authoritative Response

Server:222.255.121.247

NS records: nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duykhoa.net (unsigned zone)

⏱️ Timing

Total: 1805ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`171.244.35.243`
NS	2	`ns2.dotvndns.vn, ns1.dotvndns.vn`
SOA	1	`ns1.pavietnam.vn hostmaster.duykhoa.net`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (nsbak.pavietnam.net, nsbak.pavietnam.net)

Analysis

IP Addresses

duykhoa.net points to an IP address: 171.244.35.243.

other host names include vinhvien.edu.vn, quantri.vov.edu.vn, fect.vov.edu.vn, val.vn and nnth.vov.edu.vn; they share IP numbers with duykhoa.net.

Name Servers

duykhoa.net is delegated to five name servers: nsbak.pavietnam.net, ns1.dotvndns.vn, ns2.dotvndns.vn, ns1.pavietnam.vn and ns2.pavietnam.vn.

duykhoa.net at least partially shares name servers with other domains, for instance tuoithongminh.com, moneyone.vn, namthanh.com.vn, 2tdesign.vn and tnec.com.vn.