congthuc.edu.vn - robtex.com
congthuc.edu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.zonedns.vn ⭐ | ||||||
| A | 2401:c080:1400:1cd4:5400:5ff:fe80:ec33🇸🇬 AS-VULTR2401:c080:1400::/38 Vultr Assigned Prefix | ||||||
| A | 64.176.84.220🇸🇬 AS-VULTR64.176.80.0/20 Vultr Assigned Prefix | ||||||
| PTR | ns1.zonedns.vn | ||||||
| NS | ns2.zonedns.vn | ||||||
| A | 2401:c080:1400:1cd4:5400:5ff:fe80:ec33🇸🇬 AS-VULTR2401:c080:1400::/38 Vultr Assigned Prefix | ||||||
| A | 103.176.178.51🇻🇳 NHAN-HOA-AS-VN103.176.178.0/24 NINETECH-VN | ||||||
| NS | ns3.zonedns.vn | ||||||
| A | 2001:df1:3200::15🇻🇳 NHAN-HOA-AS-VN2001:df1:3200::/48 NHANHOA-VN | ||||||
| A | 103.28.36.30🇻🇳 NHAN-HOA-AS-VN103.28.36.0/22 NHANHOA-VN | ||||||
| NS | ns4.zonedns.vn | ||||||
| A | 2001:df1:3200::15🇻🇳 NHAN-HOA-AS-VN2001:df1:3200::/48 NHANHOA-VN | ||||||
| A | 103.28.39.159🇻🇳 NHAN-HOA-AS-VN103.28.36.0/22 NHANHOA-VN | ||||||
| SOA | ns1.zonedns.vnroot@congthuc.edu.vn 2025-12-19 #5 | ||||||
edu.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.vnpostmaster@vnnic.vn serial=2018562107 | ||||||
Previously MX for
congthuc.edu.vn |
Same first word
DNS History
7 records (4 active, 3 former)
●NSns1.zonedns.vn2016-12-05 → 2026-04-27 · 2 obs
● 2026-04-27 04:29:18
●NSns2.zonedns.vn2016-12-05 → 2026-04-27 · 2 obs
● 2026-04-27 04:29:18
●NSns3.zonedns.vn2016-12-05 → 2026-04-27 · 2 obs
● 2026-04-27 04:29:18
●NSns4.zonedns.vn2026-02-17 → 2026-04-27 · 3 obs
● 2026-02-17 18:54:28
● 2026-04-27 04:29:18
○MXcongthuc.edu.vn2016-12-05 → 2017-06-11 · 4 obs
● 2017-06-11 01:21:52
○ 2026-02-17 18:54:28
○ 2026-04-27 04:29:18
○A125.212.226.1622016-12-05 → 2016-12-05 · 3 obs
○ 2017-06-11 01:21:52
○ 2026-04-27 04:29:18
○A125.212.226.482017-06-11 → 2017-06-11 · 4 obs
● 2017-06-11 01:21:52
○ 2026-02-17 18:54:28
○ 2026-04-27 04:29:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | e.dns-servers.vn, b.dns-servers.vn, g.dns-servers.vn, d.dns-servers.vn... | - |
| congthuc.edu.vn | ns4.zonedns.vn, ns3.zonedns.vn, ns2.zonedns.vn, ns1.zonedns.vn | - |
✅ Authoritative Response
Server:64.176.84.220
NS records: ns4.zonedns.vn, ns3.zonedns.vn, ns2.zonedns.vn, ns1.zonedns.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for congthuc.edu.vn (unsigned zone)
⏱️ Timing
Total: 2537ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns2.zonedns.vn, ns1.zonedns.vn... |
| SOA | 1 | ns1.zonedns.vn root.congthuc.edu.vn |
Analysis
Name Servers
congthuc.edu.vn is delegated to four name servers: ns1.zonedns.vn, ns2.zonedns.vn, ns3.zonedns.vn and ns4.zonedns.vn.
congthuc.edu.vn at least partially shares name servers with other domains, for instance aea.space, chanlongcuu.vn, thithucdientu.gov.vn, aovua.net and minhnhat.vn.
Hostnames with two IP numbers:
Host ns1.zonedns.vn points to: 2401:c080:1400:1cd4:5400:5ff:fe80:ec33 and 64.176.84.220.
Host ns2.zonedns.vn points to: 2401:c080:1400:1cd4:5400:5ff:fe80:ec33 and 103.176.178.51.
Host ns3.zonedns.vn points to: 2001:df1:3200::15 and 103.28.36.30.
Host ns4.zonedns.vn points to: 2001:df1:3200::15 and 103.28.39.159.
Names pointing to 2401:c080:1400:1cd4:5400:5ff:fe80:ec33: ns1.zonedns.vn and ns2.zonedns.vn.
Names pointing to 2001:df1:3200::15: ns3.zonedns.vn and ns4.zonedns.vn.