a3office.vn - robtex.com
a3office.vn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 45.117.81.157🇻🇳 NHAN-HOA-AS-VN45.117.80.0/22 NHANHOA-VN | ||||||
| NS | ns1.matbao.vn ⭐ | ||||||
| A | 13.250.228.99🇸🇬 Amazon13.250.0.0/15 EC2 SIN prefix | ||||||
| PTR | ec2-13-250-228-99.ap-southeast-1.compute.amazonaws.com | ||||||
| A | 103.110.128.60🇻🇳 AXYS-VN103.110.128.0/23 | ||||||
| NS | ns-bak.matbao.com ⚠️ Not in parent delegation | ||||||
| A | 35.198.246.158🇸🇬 Google35.198.240.0/20 | ||||||
| PTR | 158.246.198.35.bc.googleusercontent.com | ||||||
| NS | ns2.matbao.vn | ||||||
| A | 35.198.203.127🇸🇬 Google35.198.192.0/20 | ||||||
| PTR | 127.203.198.35.bc.googleusercontent.com | ||||||
| A | 103.138.89.11🇻🇳 VNPT-AS-VN103.138.88.0/23 VNPT-NET | ||||||
| MX | mail.a3office.vn ⭐ | ||||||
| TXT | v=spf1 | ||||||
| SOA | ns1.matbao.vnadmin@matbao.com 2022-10-03 #2 | ||||||
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.vnpostmaster@vnnic.vn serial=2030754269 | ||||||
Subdomains
mail.a3office.vn |
Same first word
DNS History
7 records (5 active, 2 former)
●NSns-bak.matbao.com2016-12-27 → 2026-05-10 · 2 obs
● 2026-05-10 08:10:24
●MXmail.a3office.vn2016-12-27 → 2026-05-10 · 2 obs
● 2026-05-10 08:10:24
○A117.122.125.1072026-02-20 → 2026-05-10 · 2 obs
○ 2026-05-10 08:10:24
●A45.117.81.1572016-12-27 → 2026-05-10 · 2 obs
● 2026-05-10 08:10:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn... | - |
| a3office.vn | ns1.matbao.vn, ns2.matbao.vn | 2 records |
✅ Authoritative Response
Server:103.110.128.60
NS records: ns1.matbao.vn, ns2.matbao.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for a3office.vn (unsigned zone)
⏱️ Timing
Total: 1375ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 45.117.81.157 |
| NS | 3 | ns-bak.matbao.com, ns1.matbao.vn... |
| MX | 1 | mail.a3office.vn (pri: 10) |
| TXT | 1 | v=spf1 |
| SOA | 1 | ns1.matbao.vn admin.matbao.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.matbao.vn, ns2.matbao.vn)
Analysis
Hierarchy
a3office.vn is the parent of mail.a3office.vn.
IP Addresses
a3office.vn resolves to one IP number: 45.117.81.157.
other host names including saonamcorp.com, cameralongbien.vn, mail.cameralongbien.vn, bel.vn and vnct.com.vn share IP numbers with a3office.vn.
Name Servers
a3office.vn is delegated to three name servers ns-bak.matbao.com, ns1.matbao.vn and ns2.matbao.vn.
a3office.vn at least partially shares name servers with other domains, for instance tantuongkhang.vn, b2bskill.vn, xn--qung-co-si-gn-xdbl3zm827b.vn, osx.vn and sonhaithinh.com.vn.
these name servers are often used together with ns1.matbao.com, ns2.matbao.com, ns3.matbao.vn and ns4.matbao.vn.
Hosts with two IP numbers:
ns1.matbao.vn points to: 13.250.228.99 and 103.110.128.60.
ns2.matbao.vn points to: 35.198.203.127 and 103.138.89.11.
Hosts with one IP number:
ns-bak.matbao.com points to: 35.198.246.158.
Mail Servers
a3office.vn is handled by a single mail server, mail.a3office.vn.