`icss.vn`

DNSSEC	⚠️ Not signed
A	27.71.155.242^{🇻🇳 VIETEL-AS-AP27.71.152.0/21 Proxy-registered route object}
		PTR	`localhost`
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`
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`
MX	`mx2.zoho.com` ⭐
		A	204.141.33.44^{🇺🇸 ZohoAS204.141.32.0/23 PNAP-DAL CASE00103239}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.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`⁽⁵⁰⁾
		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`
		A	204.141.33.44^{🇺🇸 ZohoAS204.141.32.0/23 PNAP-DAL CASE00103239}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`v=spf1 include:zoho.com ~all`
SOA	`ns1.pavietnam.vn`hostmaster@icss.vn 2026-04-07 #97

`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=2030728088

Subdomains

www.icss.vn

Same first word

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DNS History

7 records (7 active, 0 former)

●NSns1.pavietnam.vn2026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

●NSns2.pavietnam.vn2026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

●NSnsbak.pavietnam.net2026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

●MXmx.zoho.com2026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

●MXmx2.zoho.com2026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

●MXmx3.zoho.com2026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

●A27.71.155.2422026-05-01 → 2026-05-04 · 2 obs

● 2026-05-01 10:28:36
● 2026-05-04 09:40:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	g.dns-servers.vn, b.dns-servers.vn, a.dns-servers.vn, c.dns-servers.vn...	-
icss.vn	ns1.pavietnam.vn, nsbak.pavietnam.net, ns2.pavietnam.vn	4 records

✅ Authoritative Response

Server:112.213.89.3

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for icss.vn (unsigned zone)

⏱️ Timing

Total: 1563ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`27.71.155.242`
NS	2	`ns1.pavietnam.vn, ns2.pavietnam.vn`
MX	3	`mx.zoho.com (pri: 10), mx3.zoho.com (pri: 50)...`
TXT	1	`v=spf1 include:zoho.com ~all`
SOA	1	`ns1.pavietnam.vn hostmaster.icss.vn`