`b.fullstack.edu.vn`

DNSSEC	⚠️ Not signed
A	2606:4700:20::681a:82c^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::681a:92c^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::ac43:45e2^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.8.44^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.9.44^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.69.226^{🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.26.8.44, 104.26.9.44, 172.67.69.226
		IPv6 hints	2606:4700:20::681a:82c, 2606:4700:20::681a:92c, 2606:4700:20::ac43:45e2
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=171, name=cloudflare-ech.com

`fullstack.edu.vn`

DNSSEC	⚠️ Not signed
A	2606:4700:20::681a:82c^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::681a:92c^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:20::ac43:45e2^{🇺🇸 Cloudflare2606:4700:20::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.8.44^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.26.9.44^{Cloudflare104.26.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.69.226^{🇺🇸 Cloudflare172.67.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`courtney.ns.cloudflare.com` ⭐
NS	`reese.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.26.8.44, 104.26.9.44, 172.67.69.226
		IPv6 hints	2606:4700:20::681a:82c, 2606:4700:20::681a:92c, 2606:4700:20::ac43:45e2
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=171, name=cloudflare-ech.com
SOA	`courtney.ns.cloudflare.com`dns@cloudflare.com serial=2409185332

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DNS History

6 records (6 active, 0 former)

●A104.26.8.442026-04-30 → 2026-07-19 · 2 obs

● 2026-04-30 20:08:04
● 2026-07-19 01:51:18

●A104.26.9.442026-04-30 → 2026-07-19 · 2 obs

● 2026-04-30 20:08:04
● 2026-07-19 01:51:18

●A172.67.69.2262026-04-30 → 2026-07-19 · 2 obs

● 2026-04-30 20:08:04
● 2026-07-19 01:51:18

●A2606:4700:20::681a:82c2026-04-30 → 2026-07-19 · 2 obs

● 2026-04-30 20:08:04
● 2026-07-19 01:51:18

●A2606:4700:20::681a:92c2026-04-30 → 2026-07-19 · 2 obs

● 2026-04-30 20:08:04
● 2026-07-19 01:51:18

●A2606:4700:20::ac43:45e22026-04-30 → 2026-07-19 · 2 obs

● 2026-04-30 20:08:04
● 2026-07-19 01:51:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...	-
fullstack.edu.vn	reese.ns.cloudflare.com, courtney.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.130

NS records: reese.ns.cloudflare.com, courtney.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for fullstack.edu.vn (unsigned zone)

⏱️ Timing

Total: 923ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`104.26.9.44, 172.67.69.226...`
AAAA	3	`2606:4700:20::681a:82c, 2606:4700:20::681a:92c...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

Analysis

IP Addresses

With 6 IP addresses in total, b.fullstack.edu.vn resolves to 104.26.8.44, 104.26.9.44, 172.67.69.226 and 3 other.

Among the host names that share IP numbers with b.fullstack.edu.vn are reactojt.fullstack.edu.vn, www.murray-uniformsonline.com, naremax.com and two others.

b.fullstack.edu.vn - robtex.com