`daotaokythuat.com`

DNSSEC	⚠️ Not signed
A	202.92.5.25^{🇻🇳 VNPT-AS-VN202.92.4.0/22 INET-VN}
NS	`nsbak.pavietnam.net` ⭐
		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`
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	`ns2.pavietnam.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`
MX	`mail.daotaokythuat.com` ⭐
		A	202.92.5.25^{🇻🇳 VNPT-AS-VN202.92.4.0/22 INET-VN}
MX	`mx2.zoho.com` ⭐
		A	136.143.183.44^{🇺🇸 ZohoAS136.143.182.0/23 Zoho}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽³⁰⁾
		A	136.143.183.44^{🇺🇸 ZohoAS136.143.182.0/23 Zoho}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
		A	136.143.191.44^{🇺🇸 ZohoAS136.143.190.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`v=spf1 a mx ~all`
TXT	`google-site-verification=evsbu2zo_MHB_2KvbQAwXgb0QX4BAXEgsFaOg8wLt2c`
TXT	`zoho-verification=zb87224413.zmverify.zoho.com`
TXT	`v=spf1 include:zohomail.com ~all`
SOA	`nsbak.pavietnam.net`hostmaster@daotaokythuat.com 2026-02-13 #18

`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=1775937127

Subdomains

mail.daotaokythuat.com

Same first word

daotaokythuat.com

DNS History

11 records (8 active, 3 former)

●NSns1.pavietnam.vn2015-05-17 → 2026-04-11 · 2 obs

● 2015-05-17 10:14:48
● 2026-04-11 20:15:56

●NSns2.pavietnam.vn2015-05-17 → 2026-04-11 · 2 obs

● 2015-05-17 10:14:48
● 2026-04-11 20:15:56

●NSnsbak.pavietnam.net2026-03-15 → 2026-04-11 · 3 obs

○ 2015-05-17 10:14:48
● 2026-03-15 04:45:38
● 2026-04-11 20:15:56

●MXmail.daotaokythuat.com2015-05-17 → 2026-04-11 · 2 obs

● 2015-05-17 10:14:48
● 2026-04-11 20:15:56

●MXmx.zoho.com2026-03-15 → 2026-04-11 · 3 obs

○ 2015-05-17 10:14:48
● 2026-03-15 04:45:38
● 2026-04-11 20:15:56

●MXmx2.zoho.com2026-03-15 → 2026-04-11 · 3 obs

○ 2015-05-17 10:14:48
● 2026-03-15 04:45:38
● 2026-04-11 20:15:56

●MXmx3.zoho.com2026-03-15 → 2026-04-11 · 3 obs

○ 2015-05-17 10:14:48
● 2026-03-15 04:45:38
● 2026-04-11 20:15:56

○A112.213.89.1092015-10-10 → 2017-12-22 · 5 obs

○ 2015-05-17 10:14:48
● 2015-10-10 19:05:56
● 2017-12-22 02:55:26
○ 2026-03-15 04:45:38
○ 2026-04-11 20:15:56

○A112.213.89.1472015-05-17 → 2015-05-17 · 3 obs

● 2015-05-17 10:14:48
○ 2015-10-10 19:05:56
○ 2026-04-11 20:15:56

○A202.92.4.462026-03-15 → 2026-04-11 · 2 obs

○ 2026-03-15 04:45:38
○ 2026-04-11 20:15:56

●A202.92.5.252026-03-15 → 2026-04-11 · 3 obs

○ 2017-12-22 02:55:26
● 2026-03-15 04:45:38
● 2026-04-11 20:15:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
daotaokythuat.com	nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn	-

✅ 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 daotaokythuat.com (unsigned zone)

⏱️ Timing

Total: 1408ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.92.5.25`
NS	3	`ns1.pavietnam.vn, ns2.pavietnam.vn...`
MX	4	`mx3.zoho.com (pri: 30), mx2.zoho.com (pri: 20)...`
TXT	4	`v=spf1 a mx ~all, v=spf1 include:zohomail.com ~all...`
SOA	1	`nsbak.pavietnam.net hostmaster.daotaokyt`

Analysis

Hierarchy

daotaokythuat.com is the parent of mail.daotaokythuat.com.

IP Addresses

daotaokythuat.com resolves to one IP number: 202.92.5.25.

other host names including nathun.com, pencco.com.vn, www.content.vn, thienthanhvn.com.vn and ototaynguyen.com share IP numbers with daotaokythuat.com.

Name Servers

daotaokythuat.com is delegated to three name servers nsbak.pavietnam.net, ns1.pavietnam.vn and ns2.pavietnam.vn.

daotaokythuat.com at least partially shares name servers with other domains, for instance vietskytourism.com.vn, aquafarm.vn, web1.vn, lamhong.vn and saota.vn.

These name servers are commonly used with ns1.dotvndns.vn, ns2.dotvndns.vn, nsbak.dotvndns.com, dnsbak.pavietnam.vn and nsbak.pavietnam.vn.

Host names with two IP numbers:

nsbak.pavietnam.net points to: 2406:9c80::9000:302 and 112.213.89.22.

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

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

Mail Servers

Four mail servers handle daotaokythuat.com: mail.daotaokythuat.com, mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

daotaokythuat.com shares some mail servers with other domains, at least partially, for instance yakibooki.com, ruangcasis.id, mstrading.com.br, bejoi.com and imf-gov.org.