cuasovanhoc.com - robtex.com
cuasovanhoc.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 112.213.89.78🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi | ||||||
| PTR | hector.dotvndns.com | ||||||
| NS | nsbak.pavietnam.net ⭐ | ||||||
| A | 2406:9c80::9000:302🇻🇳 SUPERDATA2406:9c80::/48 -VN | ||||||
| PTR | nsbak.dotvndns.com | ||||||
| A | 112.213.89.22🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi | ||||||
| PTR | ns8922.dotvndns.vn | ||||||
| NS | ns1.pavietnam.vn | ||||||
| A | 2406:9c80::66🇻🇳 SUPERDATA2406:9c80::/48 -VN | ||||||
| PTR | ns1.dotvndns.vn | ||||||
| A | 112.213.89.3🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi | ||||||
| PTR | ns1.dotvndns.vn | ||||||
| NS | ns2.pavietnam.vn | ||||||
| A | 2406:9c80::9000:111🇻🇳 SUPERDATA2406:9c80::/48 -VN | ||||||
| PTR | ns2.dotvndns.vn | ||||||
| A | 222.255.121.247🇻🇳 VDC222.255.121.0/24 VNPT | ||||||
| PTR | static.vdc.vn | ||||||
| PTR | static.vnpt.vn | ||||||
| MX | mail.cuasovanhoc.com ⭐ | ||||||
| A | 112.213.89.78🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi | ||||||
| PTR | hector.dotvndns.com | ||||||
| TXT | v=spf1 a mx ~all | ||||||
| SOA | nsbak.pavietnam.nethostmaster@cuasovanhoc.com 2025-10-30 #3 | ||||||
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=1774836287 | ||||||
Subdomains
Same first word
cuasovanhoc.com |
Similar names
DNS History
6 records (5 active, 1 former)
●NSns1.pavietnam.vn2016-12-04 → 2026-03-30 · 2 obs
● 2026-03-30 02:27:30
●NSns2.pavietnam.vn2016-12-04 → 2026-03-30 · 2 obs
● 2026-03-30 02:27:30
●NSnsbak.pavietnam.net2026-02-15 → 2026-03-30 · 3 obs
● 2026-02-15 04:37:20
● 2026-03-30 02:27:30
●MXmail.cuasovanhoc.com2016-12-04 → 2026-03-30 · 2 obs
● 2026-03-30 02:27:30
○A112.213.89.1092016-12-04 → 2017-06-26 · 4 obs
● 2017-06-26 01:55:28
○ 2026-02-15 04:37:20
○ 2026-03-30 02:27:30
●A112.213.89.782026-02-15 → 2026-03-30 · 3 obs
● 2026-02-15 04:37:20
● 2026-03-30 02:27:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| cuasovanhoc.com | nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn | - |
✅ Authoritative Response
Server:112.213.89.22
NS records: nsbak.pavietnam.net, ns1.pavietnam.vn, ns2.pavietnam.vn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cuasovanhoc.com (unsigned zone)
⏱️ Timing
Total: 1517ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 112.213.89.78 |
| NS | 3 | nsbak.pavietnam.net, ns1.pavietnam.vn... |
| MX | 1 | mail.cuasovanhoc.com (pri: 10) |
| TXT | 1 | v=spf1 a mx ~all |
| SOA | 1 | nsbak.pavietnam.net hostmaster.cuasovanh |
Analysis
Hierarchy
cuasovanhoc.com is a parent of www.cuasovanhoc.com and mail.cuasovanhoc.com.
IP Addresses
cuasovanhoc.com points to IP number 112.213.89.78.
For instance, other host names petrochem.com.vn, aitaa.vn, c13-b2b-iris-fa-lb.denshi.vn, mail.hocautocadonline.com and abcnews.denshi.vn share IP numbers with cuasovanhoc.com.
Name Servers
The delegation for cuasovanhoc.com is handled by three name servers: nsbak.pavietnam.net, ns1.pavietnam.vn and ns2.pavietnam.vn.
cuasovanhoc.com shares name servers with other domains at least partially, for example rynansaas.com, thamtraisan.com.vn, homestudio.vn, tuetinhduong.com and riversuiteshoian.com.
These name servers are commonly used alongside ns1.dotvndns.vn, ns2.dotvndns.vn, nsbak.dotvndns.com, nsbak.pavietnam.vn, ns3.dotvndns.vn and dnsbak.pavietnam.vn.
Host names with two IPs:
nsbak.pavietnam.net points to 2406:9c80::9000:302 and 112.213.89.22
ns1.pavietnam.vn points to 2406:9c80::66 and 112.213.89.3
ns2.pavietnam.vn points to 2406:9c80::9000:111 and 222.255.121.247
Mail Servers
cuasovanhoc.com is handled by a single mail server, mail.cuasovanhoc.com.
mail.cuasovanhoc.com points to a single IP: 112.213.89.78.