kstudy.edu.vn - robtex.com

kstudy.edu.vn

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:24fc🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:c99f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.36.252Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.201.159🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSjeff.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b7c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjeff.ns.cloudflare.com
A2803:f800:50::6ca2:c17c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRjeff.ns.cloudflare.com
A2a06:98c1:50::ac40:217c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRjeff.ns.cloudflare.com
A108.162.193.124🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjeff.ns.cloudflare.com
A172.64.33.124🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjeff.ns.cloudflare.com
A173.245.59.124🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjeff.ns.cloudflare.com
NSjo.ns.cloudflare.com
A2606:4700:50::adf5:3aac🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjo.ns.cloudflare.com
A2803:f800:50::6ca2:c0ac🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRjo.ns.cloudflare.com
A2a06:98c1:50::ac40:20ac🇺🇸 Cloudflare2a06:98c1:50::/45
PTRjo.ns.cloudflare.com
A108.162.192.172🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjo.ns.cloudflare.com
A172.64.32.172🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjo.ns.cloudflare.com
A173.245.58.172🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjo.ns.cloudflare.com
MXmx1.larksuite.com ⭐
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
MXmx2.larksuite.com(20)
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
MXmx3.larksuite.com(30)
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
A101.126.58.223🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
A122.14.230.154🇨🇳 CHINAMOBILE-CN122.14.224.0/20
TXTgoogle-site-verification=L1mIMy7TdwOqD2wjz_Y3VGmZZGhyP6QdHfFJaCdYHGI
TXTgoogle-site-verification=MRCdDY7_FJXrnm7uAHzu5LuCYN5FIrKIsqAPCMAUogE
TXTgoogle-site-verification=xsHjWcPwS1QriscTjzqJ60Dp3J3ut9a9B3eVeaDB1yI
TXTopenai-domain-verification=dv-hTdADc9qUPMwwne0AXvHEatX
TXTv=spf1 +include:spf.onlarksuite.com ~all
TXTverification-code-site-App_lark=QYmRIzQIeXER0SXLC2ab
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.36.252, 172.67.201.159
IPv6 hints2606:4700:3032::6815:24fc, 2606:4700:3037::ac43:c99f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=40, name=cloudflare-ech.com
SOAjeff.ns.cloudflare.comdns@cloudflare.com serial=2401146509

edu.vn

DNSSEC⚠️ Not signed
NSdns-master.vnnic.vn ⭐
NSa.dns-servers.vn ⚠️ Not in parent delegation
NSb.dns-servers.vn ⚠️ Not in parent delegation
NSc.dns-servers.vn ⚠️ Not in parent delegation
NSd.dns-servers.vn ⚠️ Not in parent delegation
NSe.dns-servers.vn ⚠️ Not in parent delegation
NSf.dns-servers.vn ⚠️ Not in parent delegation
NSg.dns-servers.vn ⚠️ Not in parent delegation
NSh.dns-servers.vn ⚠️ Not in parent delegation
SOAdns-master.vnnic.vnpostmaster@vnnic.vn serial=2018564885

Subdomains

chatbot.kstudy.edu.vn

Same first word

kstudy.com
kstudy.net
kstudy.co.kr
kstudy.com.tw
kstudy.edu.vn

Similar names

studyk.com
yutskd.top
tdukys.com

DNS History

13 records (9 active, 4 former)

202120222023202420252026NSjeff.ns.cloudflare.comjo.ns.cloudflare.comns1.zonedns.vnns2.zonedns.vnns3.zonedns.vnMXmx1.larksuite.commx2.larksuite.commx3.larksuite.comA104.21.36.252172.67.201.1592606:4700:3032::6815:24fc2606:4700:3037::ac43:c99f103.221.222.30
●NSjeff.ns.cloudflare.com2026-04-30 → 2026-05-10 · 3 obs
○ 2020-04-05 12:52:40
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
●NSjo.ns.cloudflare.com2026-04-30 → 2026-05-10 · 3 obs
○ 2020-04-05 12:52:40
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
○NSns1.zonedns.vn2020-04-05 → 2020-04-05 · 3 obs
● 2020-04-05 12:52:40
○ 2026-04-30 23:19:20
○ 2026-05-10 18:03:42
○NSns2.zonedns.vn2020-04-05 → 2020-04-05 · 3 obs
● 2020-04-05 12:52:40
○ 2026-04-30 23:19:20
○ 2026-05-10 18:03:42
○NSns3.zonedns.vn2020-04-05 → 2020-04-05 · 3 obs
● 2020-04-05 12:52:40
○ 2026-04-30 23:19:20
○ 2026-05-10 18:03:42
●MXmx1.larksuite.com2026-04-30 → 2026-05-10 · 2 obs
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
●MXmx2.larksuite.com2026-04-30 → 2026-05-10 · 2 obs
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
●MXmx3.larksuite.com2026-04-30 → 2026-05-10 · 2 obs
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
○A103.221.222.302020-04-05 → 2020-04-05 · 3 obs
● 2020-04-05 12:52:40
○ 2026-04-30 23:19:20
○ 2026-05-10 18:03:42
●A104.21.36.2522026-04-30 → 2026-05-10 · 3 obs
○ 2020-04-05 12:52:40
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
●A172.67.201.1592026-04-30 → 2026-05-10 · 3 obs
○ 2020-04-05 12:52:40
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
●A2606:4700:3032::6815:24fc2026-04-30 → 2026-05-10 · 3 obs
○ 2020-04-05 12:52:40
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42
●A2606:4700:3037::ac43:c99f2026-04-30 → 2026-05-10 · 3 obs
○ 2020-04-05 12:52:40
● 2026-04-30 23:19:20
● 2026-05-10 18:03:42

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
vna.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...-
kstudy.edu.vnjeff.ns.cloudflare.com, jo.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.59.124

NS records: jeff.ns.cloudflare.com, jo.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 1391ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.36.252, 172.67.201.159
AAAA22606:4700:3032::6815:24fc, 2606:4700:3037::ac43:c99f
NS2jeff.ns.cloudflare.com, jo.ns.cloudflare.com
MX3mx1.larksuite.com (pri: 10), mx2.larksuite.com (pri: 20)...
TXT6google-site-verification=L1mIMy7TdwOqD2w, google-site-verification=MRCdDY7_FJXrnm7...
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1jeff.ns.cloudflare.com dns.cloudflare.co

Analysis

Hierarchy

kstudy.edu.vn is a parent of chatbot.kstudy.edu.vn.

IP Addresses

kstudy.edu.vn resolves to four IPs: 2606:4700:3032::6815:24fc, 2606:4700:3037::ac43:c99f, 104.21.36.252 and 172.67.201.159.

Other host names such as dms-dsm.com, suncity68.blog, slcghost.com, saaclub.com and spbpages.ru share IP numbers with kstudy.edu.vn.

Name Servers

kstudy.edu.vn is delegated to two name servers: jeff.ns.cloudflare.com and jo.ns.cloudflare.com.

kstudy.edu.vn uses the same name server setup as other domains, including uvwristbands.com.au, fisha.co.il, netoneto.co.il, sportsbox.info and akko.ro.

At least part of the name servers for kstudy.edu.vn are shared with other domains, for instance mmxianxia.com, soundofmusic.net, hausmann.org.uk, tenerife-airport.es and litecoin4mix.to.

These name servers are commonly used alongside art.ns.cloudflare.com and eva.ns.cloudflare.com.

Host names with six IP numbers:

jeff.ns.cloudflare.com points to: 2606:4700:58::adf5:3b7c, 2803:f800:50::6ca2:c17c, 2a06:98c1:50::ac40:217c, 108.162.193.124, 172.64.33.124 and 173.245.59.124.

jo.ns.cloudflare.com points to: 2606:4700:50::adf5:3aac, 2803:f800:50::6ca2:c0ac, 2a06:98c1:50::ac40:20ac, 108.162.192.172, 172.64.32.172 and 173.245.58.172.

Mail Servers

Three mail servers handle kstudy.edu.vn: mx1.larksuite.com, mx2.larksuite.com and mx3.larksuite.com.

kstudy.edu.vn shares at least some mail servers with other domains, for example blueseagroupvn.com, satellitejewel.com, webmau.vn, saoxanh.vn and ate.group.

Host names with three IPs:

Host name mx3.larksuite.com points to: 18.139.153.173, 101.126.58.223 and 122.14.230.154.

Host names with a single IP:

Host name mx1.larksuite.com points to: 18.139.153.173.

Host name mx2.larksuite.com points to: 18.139.153.173.

Names pointing to 18.139.153.173: mx3.larksuite.com, mx1.larksuite.com and mx2.larksuite.com.