mail.vietnamknowledge.com - robtex.com
mail.vietnamknowledge.com
| CNAME | vietnamknowledge.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.26.1.226Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.matbao.com ⭐ ⚠️ Not in zone NS records | ||||||
| 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 | ns1.infinityfree.com ⚠️ Not in parent delegation | ||||||
| A | 198.251.90.216FRANTECH198.251.90.0/24 More specific route. | ||||||
| PTR | ns1.byet.org | ||||||
| NS | ns2.infinityfree.com ⚠️ Not in parent delegation | ||||||
| A | 198.251.86.153🇺🇸 FRANTECH198.251.86.0/24 More specific route. | ||||||
| PTR | ns3.byet.org | ||||||
| NS | ns2.matbao.com ⚠️ Not in zone NS records | ||||||
| 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.vietnamknowledge.com ⭐ | ||||||
| TXT | v=spf1 mx include:104.26.1.226 -all | ||||||
| SOA | ns1.matbao.comadmin@matbao.com 2023-12-08 #1 | ||||||
vietnamknowledge.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.26.1.226Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.matbao.com ⭐ ⚠️ Not in zone NS records | ||||||
| NS | ns1.infinityfree.com ⚠️ Not in parent delegation | ||||||
| NS | ns2.infinityfree.com ⚠️ Not in parent delegation | ||||||
| NS | ns2.matbao.com ⚠️ Not in zone NS records | ||||||
| MX | mail.vietnamknowledge.com ⭐ | ||||||
| TXT | v=spf1 mx include:104.26.1.226 -all | ||||||
| SOA | ns1.matbao.comadmin@matbao.com 2023-12-08 #1 | ||||||
MX for
Same first word
Similar names
DNS History
1 record (1 active, 0 former)
●CNAMEvietnamknowledge.com2026-03-22 → 2026-05-10 · 2 obs
● 2026-05-10 16:01:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | g.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net... | - |
| vietnamknowledge.com | ns1.matbao.com, ns2.matbao.com | 4 records |
✅ Authoritative Response
Server:103.138.89.11
NS records: ns1.matbao.com, ns2.matbao.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for vietnamknowledge.com (unsigned zone)
⏱️ Timing
Total: 5223ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | vietnamknowledge.com |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.matbao.com, ns1.matbao.com, ns2.matbao.com...)
Analysis
Mail Server Role
mail.vietnamknowledge.com serves as the mail server for vietnamknowledge.com.
IP Addresses
mail.vietnamknowledge.com points to an IP address: 104.26.1.226.
other host names include dash.infinityfree.com, soundpark.jp, www.mangakawaii.io, creditstar.pl and www.country.is; they share IP numbers with mail.vietnamknowledge.com.
Name Servers
mail.vietnamknowledge.com delegates to four name servers: ns1.infinityfree.com, ns2.infinityfree.com, ns1.matbao.com and ns2.matbao.com.
mail.vietnamknowledge.com at least partially shares name servers with other domains, for instance loihoaduong.vn, nhadatmelinh.com, bigdataglobe.com, chototviet.com and healthy-care.vn.
these name servers are commonly used alongside the name servers ns1.byet.org, ns2.byet.org, ns3.byet.org, ns4.byet.org, ns5.byet.org, ns1.matbao.vn and ns2.matbao.vn.
Host names with two IP numbers:
ns1.matbao.com points to: 13.250.228.99 and 103.110.128.60
ns2.matbao.com points to: 35.198.203.127 and 103.138.89.11
Host names with one IP number:
ns1.infinityfree.com points to: 198.251.90.216
ns2.infinityfree.com points to: 198.251.86.153
Mail Servers
mail.vietnamknowledge.com is handled by a single mail server.
The mail server setup for mail.vietnamknowledge.com is the same as for other domains, such as vietnamknowledge.com.