`congtydonghai.com.vn`

DNSSEC	⚠️ Not signed
A	171.244.7.83^{🇻🇳 VTDC-AS-VN171.244.4.0/22 Proxy-registered route object}
A	171.244.7.84^{🇻🇳 VTDC-AS-VN171.244.4.0/22 Proxy-registered route object}
NS	`ns1.viettelidc.com.vn` ⭐ ⚠️ Not in parent delegation
		A	2401:5f80:2000:2::4^{🇻🇳 VTDC-AS-VN2401:5f80:2000::/36 VTDC-VN}
		A	115.84.177.33^{🇻🇳 VTDC-AS-VN115.84.176.0/22 Proxy-registered route object}
			PTR	`ns1.vtdc.net`
			PTR	`ns1.viettelidc.com.vn`
NS	`ns.viettelidc.com.vn`
		A	2401:5f80:2000:1::5^{🇻🇳 VTDC-AS-VN2401:5f80:2000::/36 VTDC-VN}
		A	115.84.177.8^{🇻🇳 VTDC-AS-VN115.84.176.0/22 Proxy-registered route object}
			PTR	`ns.vtdc.net`
			PTR	`ns.viettelidc.com.vn`
NS	`ns2.viettelidc.com.vn`
		A	2401:5f80:4000:1::4^{🇻🇳 VTDC-AS-VN2401:5f80:4000::/36 VTDC-VN}
		A	115.84.181.10^{🇻🇳 VTDC-AS-VN115.84.180.0/22 Proxy-registered route object}
			PTR	`ns2.vtdc.net`
			PTR	`ns2.viettelidc.com.vn`
SOA	`ns.viettelidc.com.vn`hostmaster@congtydonghai.com.vn serial=1778305808

`com.vn`

	DNSSEC	⚠️ Not signed
	NS	`dns-master.vnnic.vn` ⭐
	NS	`a.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`b.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`c.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`d.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`e.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`f.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`g.dns-servers.vn` ⚠️ Not in parent delegation
	NS	`h.dns-servers.vn` ⚠️ Not in parent delegation
	SOA	`dns-master.vnnic.vn`postmaster@vnnic.vn serial=2022706396

Same first word

congtydonghai.com.vn

DNS History

7 records (5 active, 2 former)

●NSns.viettelidc.com.vn2020-04-07 → 2026-05-09 · 2 obs

● 2020-04-07 15:51:02
● 2026-05-09 05:52:10

●NSns1.viettelidc.com.vn2020-04-07 → 2026-05-09 · 2 obs

● 2020-04-07 15:51:02
● 2026-05-09 05:52:10

●NSns2.viettelidc.com.vn2020-04-07 → 2026-05-09 · 2 obs

● 2020-04-07 15:51:02
● 2026-05-09 05:52:10

○A171.244.7.672020-04-07 → 2020-04-07 · 3 obs

● 2020-04-07 15:51:02
○ 2026-03-06 01:28:00
○ 2026-05-09 05:52:10

○A171.244.7.682020-04-07 → 2020-04-07 · 3 obs

● 2020-04-07 15:51:02
○ 2026-03-06 01:28:00
○ 2026-05-09 05:52:10

●A171.244.7.832026-03-06 → 2026-05-09 · 3 obs

○ 2020-04-07 15:51:02
● 2026-03-06 01:28:00
● 2026-05-09 05:52:10

●A171.244.7.842026-03-06 → 2026-05-09 · 3 obs

○ 2020-04-07 15:51:02
● 2026-03-06 01:28:00
● 2026-05-09 05:52:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...	-
congtydonghai.com.vn	ns1.viettelidc.com.vn, ns2.viettelidc.com.vn	2 records

✅ Authoritative Response

Server:115.84.181.10

NS records: ns1.viettelidc.com.vn, ns2.viettelidc.com.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for congtydonghai.com.vn (unsigned zone)

⏱️ Timing

Total: 1107ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`171.244.7.83, 171.244.7.84`
NS	3	`ns.viettelidc.com.vn, ns1.viettelidc.com.vn...`
SOA	1	`ns.viettelidc.com.vn hostmaster.congtydo`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.viettelidc.com.vn, ns1.viettelidc.com.vn)

Analysis

IP Addresses

congtydonghai.com.vn points to two IPs: 171.244.7.83 and 171.244.7.84.

Other host names, for instance cokhi17.com, vrtc.org.vn, yhoccotruyenqd.vn, tongcongtydongbac.com.vn and agtex.com.vn share IP numbers with congtydonghai.com.vn.

Name Servers

congtydonghai.com.vn is delegated to name servers ns1.viettelidc.com.vn, ns2.viettelidc.com.vn and ns.viettelidc.com.vn.

congtydonghai.com.vn at least partially shares name servers with other domains such as hnla.com.vn, mrm-hk.com, dinhchem.gov.vn, trungtamyteyenbinh.com.vn and thudojsc.vn.

These name servers are commonly used alongside ns1.vtdc.net, ns2.vtdc.net and ns.vtdc.net.

Host names with two IP numbers:

ns1.viettelidc.com.vn points to 2401:5f80:2000:2::4 and 115.84.177.33.

ns2.viettelidc.com.vn points to 2401:5f80:4000:1::4 and 115.84.181.10.

ns.viettelidc.com.vn points to 2401:5f80:2000:1::5 and 115.84.177.8.

congtydonghai.com.vn - robtex.com