icourse.edu.vn - robtex.com
icourse.edu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.matbao.com ⭐ ⚠️ Not in parent delegation | ||||||
| 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.matbao.vn ⚠️ 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 | ns2.matbao.com ⚠️ Not in parent delegation | ||||||
| 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 | ||||||
| NS | ns2.matbao.vn ⚠️ 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 | ||||||
| SOA | ns1.matbao.comadmin@matbao.com 2025-05-20 #1 | ||||||
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=2018565044 | ||||||
Subdomains
www.icourse.edu.vn |
idx.icourse.edu.vn |
elab-dev.icourse.edu.vn |
nuyimelab-dev-api.icourse.edu.vn |
elab.icourse.edu.vn |
22b0fb0b-bdf2-46a7-9fe7-6684f700583d.icourse.edu.vn |
idx-admin.icourse.edu.vn |
elab-dev-api.icourse.edu.vn |
elab-api.icourse.edu.vn |
bbb.icourse.edu.vn |
Same first word
icourse.sk |
icourse.net |
icourse.edu.vn |
icourse.ru |
icourse.cz |
icourse.org |
icourse.co.uk |
icourse.nl |
icourse.com |
icourse.club |
Similar names
DNS History
4 records (4 active, 0 former)
●NSns1.matbao.com2026-05-04 → 2026-05-11 · 2 obs
● 2026-05-11 10:30:22
●NSns2.matbao.com2026-05-04 → 2026-05-11 · 2 obs
● 2026-05-11 10:30:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn... | - |
| icourse.edu.vn | ns1.matbao.vn, ns2.matbao.vn | - |
✅ Authoritative Response
Server:103.138.89.11
NS records: ns1.matbao.vn, ns2.matbao.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for icourse.edu.vn (unsigned zone)
⏱️ Timing
Total: 4074ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.matbao.com, ns2.matbao.com |
| SOA | 1 | ns1.matbao.com admin.matbao.com |
Analysis
Hierarchy
icourse.edu.vn is a parent of www.icourse.edu.vn, idx.icourse.edu.vn, elab-dev.icourse.edu.vn, nuyimelab-dev-api.icourse.edu.vn and elab.icourse.edu.vn, plus a few other host names.
Name Servers
icourse.edu.vn delegates to four name servers: ns1.matbao.com, ns2.matbao.com, ns1.matbao.vn and ns2.matbao.vn.
icourse.edu.vn at least partially shares name servers with other domains, including loxocongnghiep.com.vn, qdtrans.net, bomdinhluong.com.vn, sba.net.vn and vica.vn.
these name servers are commonly used alongside the name servers ns-bak.matbao.com, ns3.matbao.vn, ns4.matbao.vn, ns3.matbao.com and ns4.matbao.com.
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.
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.
Host names that point to 13.250.228.99: ns1.matbao.com and ns1.matbao.vn.
Host names that point to 103.110.128.60: ns1.matbao.com and ns1.matbao.vn.
Host names that point to 35.198.203.127: ns2.matbao.com and ns2.matbao.vn.
Host names that point to 103.138.89.11: ns2.matbao.com and ns2.matbao.vn.