oj.tcpp.edu.vn - robtex.com

oj.tcpp.edu.vn

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:855f🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:574🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.5.116Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.133.95🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.5.116, 172.67.133.95
IPv6 hints2606:4700:3030::ac43:855f, 2606:4700:3031::6815:574
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=108, name=cloudflare-ech.com

tcpp.edu.vn

DNSSEC🔒 Signed (DS record present)
A2606:4700:3030::ac43:855f🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:574🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.5.116Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.133.95🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSchad.ns.cloudflare.com ⭐
NSdanica.ns.cloudflare.com
MXmx1.larksuite.com ⭐
MXmx2.larksuite.com(5)
MXmx3.larksuite.com(10)
TXTv=spf1 +include:spf.onlarksuite.com -all
TXTverification-code-site-App_lark=R3MMjkYm83F6S8Ta8kbs
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.5.116, 172.67.133.95
IPv6 hints2606:4700:3030::ac43:855f, 2606:4700:3031::6815:574
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=108, name=cloudflare-ech.com
SOAchad.ns.cloudflare.comdns@cloudflare.com serial=2404110570

Same first word

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DNS History

4 records (4 active, 0 former)

A104.21.5.116172.67.133.952606:4700:3030::ac43:855f2606:4700:3031::6815:574
●A104.21.5.1162026-05-01 → 2026-05-13 · 2 obs
● 2026-05-01 05:48:36
● 2026-05-13 10:36:10
●A172.67.133.952026-05-01 → 2026-05-13 · 2 obs
● 2026-05-01 05:48:36
● 2026-05-13 10:36:10
●A2606:4700:3030::ac43:855f2026-05-01 → 2026-05-13 · 2 obs
● 2026-05-01 05:48:36
● 2026-05-13 10:36:10
●A2606:4700:3031::6815:5742026-05-01 → 2026-05-13 · 2 obs
● 2026-05-01 05:48:36
● 2026-05-13 10:36:10

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
vna.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...-
tcpp.edu.vnchad.ns.cloudflare.com, danica.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.82

NS records: chad.ns.cloudflare.com, danica.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1008ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.133.95, 104.21.5.116
AAAA22606:4700:3030::ac43:855f, 2606:4700:3031::6815:574
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

oj.tcpp.edu.vn resolves to four IP numbers: 2606:4700:3030::ac43:855f, 2606:4700:3031::6815:574, 104.21.5.116 and 172.67.133.95.

Other host names such as dyanpro.net, oelzy.de, fimacomarketing.com, skyflaretrust.click and codeselfstudy.com share IPs with oj.tcpp.edu.vn.