`vn.programming.school`

DNSSEC	⚠️ Not signed
A	112.213.86.31^{🇻🇳 SUPERDATA112.213.86.0/24 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	`mx8631.superdata.vn`

`programming.school`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:9e64^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:3a56^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.58.86^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.158.100^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jihoon.ns.cloudflare.com` ⭐
NS	`martha.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⁾
TXT	`ZOOM_verify_2mzSsJVwRqi3fRhGHTXe_w`
TXT	`google-site-verification=HNDjaamdAoh2-PTFq4rTJwwKWV0c7UbW-BXySw47feo`
TXT	`google-site-verification=vUgmvsZd73OK0Y9bfdGQJwNivgRIrTnLGH9Nf5QAFtI`
TXT	`v=spf1 include:_spf.mlsend.com include:one.zoho.com include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.58.86, 172.67.158.100
		IPv6 hints	2606:4700:3031::ac43:9e64, 2606:4700:3037::6815:3a56
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=97, name=cloudflare-ech.com
SOA	`jihoon.ns.cloudflare.com`dns@cloudflare.com serial=2402872972

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DNS History

1 record (1 active, 0 former)

●A112.213.86.312026-05-01 → 2026-05-15 · 2 obs

● 2026-05-01 11:24:56
● 2026-05-15 11:16:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
school	v2n0.nic.school, v0n2.nic.school, v0n0.nic.school, v0n3.nic.school...	12 records
programming.school	martha.ns.cloudflare.com, jihoon.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.142

NS records: martha.ns.cloudflare.com, jihoon.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for programming.school (unsigned zone)

⏱️ Timing

Total: 604ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`112.213.86.31`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v2n0.nic.school, v2n0.nic.school, v0n2.nic.school...)

Analysis

IP Addresses

vn.programming.school points to a single IP number: 112.213.86.31.

Other host names, for instance ysinhhoc.vn, huyhoang.info, mail.huyhoang.info, mail.ysinhhoc.vn and www.ysinhhoc.vn share IP numbers with vn.programming.school.

vn.programming.school - robtex.com