congtoan.com.vn - robtex.com
congtoan.com.vn
| CNAME | dns.edubit.vn | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 14.225.18.34🇻🇳 VNPT-AS-VN14.225.18.0/24 VNPT | ||||||
| PTR | static.vnpt.vn | ||||||
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.vnpostmaster@vnnic.vn serial=2022706665 | ||||||
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSns-master.inet.vn2026-04-16 → 2026-05-09 · 2 obs
● 2026-04-16 18:48:30
● 2026-05-09 15:59:38
● 2026-05-09 15:59:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | d.dns-servers.vn, g.dns-servers.vn, f.dns-servers.vn, a.dns-servers.vn... | - |
| congtoan.com.vn | ns2.inet.vn, ns1.inet.vn, ns3.inet.vn | - |
✅ Authoritative Response
Server:202.92.4.25
NS records: ns2.inet.vn, ns1.inet.vn, ns3.inet.vn
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at vn: Error: DNS query timeout: 203.119.44.105 for DNSKEY vn
⏱️ Timing
Total: 4491ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | dns.edubit.vn |
| SOA | 1 | ns-master.inet.vn postmaster.inet.vn |
Analysis
IP Addresses
congtoan.com.vn points to a single IP number: 14.225.18.34.
Other host names, for instance edubit.vn, hocnghechuyennghiep.edubit.vn, acman.edu.vn, 21day.edubit.vn and dannyenglish.edubit.vn share IP numbers with congtoan.com.vn.