htthanhcong.com - robtex.com
htthanhcong.com
| 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 | ||||||
| MX | mail.htthanhcong.com ⭐ | ||||||
| A | 103.28.38.156🇻🇳 NHAN-HOA-AS-VN103.28.36.0/22 NHANHOA-VN | ||||||
| PTR | mail.htthanhcong.com | ||||||
| TXT | v=spf1 mx ip4:103.28.38.156 include:_spf.email-nhanhoa.net -all | ||||||
| SOA | ns1.zonedns.vnroot@htthanhcong.com 2026-03-13 #5 | ||||||
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.netnstld@verisign-grs.com serial=1778539031 | ||||||
Subdomains
mail.htthanhcong.com |
DNS History
5 records (5 active, 0 former)
●NSns1.zonedns.vn2026-05-11 → 2026-05-11 · 2 obs
● 2026-05-11 23:05:34
●NSns2.zonedns.vn2026-05-11 → 2026-05-11 · 2 obs
● 2026-05-11 23:05:34
●NSns3.zonedns.vn2026-05-11 → 2026-05-11 · 2 obs
● 2026-05-11 23:05:34
●NSns4.zonedns.vn2026-05-11 → 2026-05-11 · 2 obs
● 2026-05-11 23:05:34
●MXmail.htthanhcong.com2026-05-11 → 2026-05-11 · 2 obs
● 2026-05-11 23:05:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| htthanhcong.com | ns1.zonedns.vn, ns2.zonedns.vn, ns3.zonedns.vn, ns4.zonedns.vn | - |
✅ Authoritative Response
Server:103.176.178.51
NS records: ns1.zonedns.vn, ns2.zonedns.vn, ns3.zonedns.vn, ns4.zonedns.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for htthanhcong.com (unsigned zone)
⏱️ Timing
Total: 4218ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns4.zonedns.vn, ns3.zonedns.vn... |
| MX | 1 | mail.htthanhcong.com (pri: 10) |
| TXT | 1 | v=spf1 mx ip4:103.28.38.156 include:_spf |
| SOA | 1 | ns1.zonedns.vn root.htthanhcong.com |
Analysis
Hierarchy
htthanhcong.com is the parent of mail.htthanhcong.com.
Name Servers
htthanhcong.com is delegated to four name servers: ns1.zonedns.vn, ns2.zonedns.vn, ns3.zonedns.vn and ns4.zonedns.vn.
htthanhcong.com at least partially shares name servers with other domains, for instance phanmemdacap.net, chomau.com, cafephim.vn, firstchoicelogisticsvn.com and phuongnamec.vn.
These name servers are commonly used alongside ns2008.nhanhoa.com.vn and ns2009.nhanhoa.com.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.
Mail Servers
htthanhcong.com is handled by a single mail server, mail.htthanhcong.com.
mail.htthanhcong.com resolves to IP 103.28.38.156.