qdu.vn - robtex.com
qdu.vn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::6815:3353🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3034::ac43:b194🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.51.83Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.177.148🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | alan.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3b39🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | alan.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c139🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | alan.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2139🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | alan.ns.cloudflare.com | ||||||
| A | 108.162.193.57🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | alan.ns.cloudflare.com | ||||||
| A | 172.64.33.57🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | alan.ns.cloudflare.com | ||||||
| A | 173.245.59.57🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | alan.ns.cloudflare.com | ||||||
| NS | megan.ns.cloudflare.com | ||||||
| A | 2606:4700:50::adf5:3ac5🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | megan.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c0c5🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | megan.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:20c5🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | megan.ns.cloudflare.com | ||||||
| A | 108.162.192.197🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | megan.ns.cloudflare.com | ||||||
| A | 172.64.32.197🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | megan.ns.cloudflare.com | ||||||
| A | 173.245.58.197🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | megan.ns.cloudflare.com | ||||||
| MX | mx.yandex.net ⭐ | ||||||
| A | 2a02:6b8::311🇷🇺 TELETECH2a02:6b8::/32 Yandex network | ||||||
| PTR | mxfront.stable.qloud-b.yandex.net | ||||||
| A | 77.88.21.249🇷🇺 TELETECH77.88.0.0/18 Yandex enterprise network | ||||||
| PTR | mxfront.stable.qloud-b.yandex.net | ||||||
| TXT | v=spf1 redirect=_spf.yandex.net | ||||||
| TXT | yandex-verification: 086edace7de61b14 | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.51.83, 172.67.177.148 | ||||||
| IPv6 hints | 2606:4700:3032::6815:3353, 2606:4700:3034::ac43:b194 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=43, name=cloudflare-ech.com | ||||||
| SOA | alan.ns.cloudflare.comdns@cloudflare.com serial=2411627269 | ||||||
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=2031106401 | ||||||
Subdomains
app.qdu.vn |
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●NSalan.ns.cloudflare.com2026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
●NSmegan.ns.cloudflare.com2026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
●MXmx.yandex.net2026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
●A104.21.51.832026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
●A172.67.177.1482026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
●A2606:4700:3032::6815:33532026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
●A2606:4700:3034::ac43:b1942026-07-19 → 2026-08-13 · 2 obs
● 2026-08-13 20:18:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| vn | b.dns-servers.vn, g.dns-servers.vn, d.dns-servers.vn, h.dns-servers.vn... | - |
| qdu.vn | megan.ns.cloudflare.com, alan.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.59.57
NS records: megan.ns.cloudflare.com, alan.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for qdu.vn (unsigned zone)
⏱️ Timing
Total: 924ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.51.83, 172.67.177.148 |
| AAAA | 2 | 2606:4700:3034::ac43:b194, 2606:4700:3032::6815:3353 |
| NS | 2 | alan.ns.cloudflare.com, megan.ns.cloudflare.com |
| MX | 1 | mx.yandex.net (pri: 10) |
| TXT | 2 | v=spf1 redirect=_spf.yandex.net, yandex-verification: 086edace7de61b14 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | alan.ns.cloudflare.com dns.cloudflare.co |
Analysis
Hierarchy
qdu.vn is a parent domain of app.qdu.vn.
IP Addresses
qdu.vn has four IP addresses: 104.21.51.83, 172.67.177.148, 2606:4700:3032::6815:3353 and 2606:4700:3034::ac43:b194.
www.g-comm.com.cn, www.orbit.net.sa, aka555.app plus two other host names have IP numbers in common with qdu.vn.
Name Servers
DNS delegation for qdu.vn points to two name servers: alan.ns.cloudflare.com and megan.ns.cloudflare.com.
The name server configuration of qdu.vn is shared with other domains, for instance crimson.agency, glorywebs.com, redcomm.co.id and two others.
qdu.vn shares at least some of its name servers with other domains, including clbgamesvn.com, cineplex.com.co, 701888a.app and two others.
Hosts with 6 IP addresses each:
alan.ns.cloudflare.com has IP addresses 108.162.193.57, 172.64.33.57 and 173.245.59.57, plus 3 other.
megan.ns.cloudflare.com has IP addresses 108.162.192.197, 172.64.32.197 and 173.245.58.197, plus 3 other.
Mail Servers
qdu.vn uses one mail server — mx.yandex.net.
The mail server setup of qdu.vn matches that of other domains such as (0x787878)(0x787878).su, sol-diz.ru, toplusms.tc and two others.
At least some of the mail servers used by qdu.vn are shared with other domains: levenhukb2b.com, totogaming.com, caipal.com and two others among them.
mx.yandex.net points to two IP addresses: 77.88.21.249 and 2a02:6b8::311.