udacity.tw - robtex.com

udacity.tw

DNSSEC⚠️ Not signed
A2606:4700:3034::6815:2b37🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:dd28🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.43.55Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.221.40🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSingrid.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3aa5🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRingrid.ns.cloudflare.com
A2803:f800:50::6ca2:c0a5🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRingrid.ns.cloudflare.com
A2a06:98c1:50::ac40:20a5🇺🇸 Cloudflare2a06:98c1:50::/45
PTRingrid.ns.cloudflare.com
A108.162.192.165🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRingrid.ns.cloudflare.com
A172.64.32.165🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRingrid.ns.cloudflare.com
A173.245.58.165🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRingrid.ns.cloudflare.com
NSkai.ns.cloudflare.com
A2606:4700:58::adf5:3bbc🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
A2803:f800:50::6ca2:c1bc🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRkai.ns.cloudflare.com
A2a06:98c1:50::ac40:21bc🇺🇸 Cloudflare2a06:98c1:50::/45
PTRkai.ns.cloudflare.com
A108.162.193.188🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
A172.64.33.188🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
A173.245.59.188🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRkai.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.43.55, 172.67.221.40
IPv62606:4700:3034::6815:2b37, 2606:4700:3034::ac43:dd28
SOAingrid.ns.cloudflare.comdns@cloudflare.com serial=2397682575

tw

DNSSEC🔒 Signed (DS record present)
NSa.dns.tw ⭐
NSanytld.apnic.net ⚠️ Not in parent delegation
NSb.dns.tw
NSc.dns.tw
NSd.dns.tw
NSe.dns.tw
NSf.dns.tw
NSg.dns.tw
NSh.dns.tw
SOAa.dns.twsnw@twnic.net.tw serial=2010994907

Same first word

udacity.institute
udacity.tech
udacity.works
udacity.in
udacity.co.in
udacity.info
udacity.pt
udacity.training
udacity.tw
udacity.sg
udacity.my
udacity.fit
udacity.ae
udacity.vn
udacity.dev
udacity.net
udacity.sucks
udacity.cr
udacity.ph
udacity.work
udacity.com.ar
udacity.jobs
udacity.de
udacity.design
udacity.fr
udacity.cz
udacity.uk
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udacity.co.uk
udacity.asia
udacity.com
udacity.cl
udacity.co
udacity.it
udacity.am
udacity.org
udacity.co.kr
udacity.technology
udacity.ru
udacity.online
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udacity.mobi
udacity.com.sg
udacity.build
udacity.dk
udacity.university
udacity.cc
udacity.mx
udacity.us
udacity.tv
udacity.marketing
udacity.io

Similar names

cyudati.com
cyaudit.com
taiyudc.com
dacuity.com
auditcy.com
ycaudit.com
caduity.com
adcuity.com
cdtaiyu.com
audcity.com
daucity.de
tycuida.com
cdyutai.com
audcity.de

DNS History

10 records (6 active, 4 former)

NSingrid.ns.cloudflare.comkai.ns.cloudflare.comA104.21.43.55172.67.221.402606:4700:3034::6815:2b372606:4700:3034::ac43:dd28188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NSingrid.ns.cloudflare.com2026-02-23 → 2026-03-23 · 2 obs
● 2026-02-23 11:12:04
● 2026-03-23 07:25:02
●NSkai.ns.cloudflare.com2026-02-23 → 2026-03-23 · 2 obs
● 2026-02-23 11:12:04
● 2026-03-23 07:25:02
●A104.21.43.552026-02-23 → 2026-03-23 · 4 obs
● 2026-02-23 11:12:04
○ 2026-03-12 17:03:44
● 2026-03-17 15:19:28
● 2026-03-23 07:25:02
●A172.67.221.402026-02-23 → 2026-03-23 · 4 obs
● 2026-02-23 11:12:04
○ 2026-03-12 17:03:44
● 2026-03-17 15:19:28
● 2026-03-23 07:25:02
○A188.114.96.02026-03-12 → 2026-03-12 · 4 obs
○ 2026-02-23 11:12:04
● 2026-03-12 17:03:44
○ 2026-03-17 15:19:28
○ 2026-03-23 07:25:02
○A188.114.97.02026-03-12 → 2026-03-12 · 4 obs
○ 2026-02-23 11:12:04
● 2026-03-12 17:03:44
○ 2026-03-17 15:19:28
○ 2026-03-23 07:25:02
●A2606:4700:3034::6815:2b372026-02-23 → 2026-03-23 · 4 obs
● 2026-02-23 11:12:04
○ 2026-03-12 17:03:44
● 2026-03-17 15:19:28
● 2026-03-23 07:25:02
●A2606:4700:3034::ac43:dd282026-02-23 → 2026-03-23 · 4 obs
● 2026-02-23 11:12:04
○ 2026-03-12 17:03:44
● 2026-03-17 15:19:28
● 2026-03-23 07:25:02
○A2a06:98c1:3120::2026-03-12 → 2026-03-12 · 4 obs
○ 2026-02-23 11:12:04
● 2026-03-12 17:03:44
○ 2026-03-17 15:19:28
○ 2026-03-23 07:25:02
○A2a06:98c1:3121::2026-03-12 → 2026-03-12 · 4 obs
○ 2026-02-23 11:12:04
● 2026-03-12 17:03:44
○ 2026-03-17 15:19:28
○ 2026-03-23 07:25:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
twg.dns.tw, anytld.apnic.net, e.dns.tw, a.dns.tw...16 records
udacity.twkai.ns.cloudflare.com, ingrid.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.188

NS records: kai.ns.cloudflare.com, ingrid.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for udacity.tw (unsigned zone)

⏱️ Timing

Total: 730ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.221.40, 104.21.43.55
AAAA22606:4700:3034::ac43:dd28, 2606:4700:3034::6815:2b37
NS2ingrid.ns.cloudflare.com, kai.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1ingrid.ns.cloudflare.com dns.cloudflare.

📌 Glue Records Collected

Total: 16

In-bailiwick: 14 (g.dns.tw, e.dns.tw, e.dns.tw...)

Out-of-bailiwick: 2 (anytld.apnic.net, anytld.apnic.net)

Analysis

IP Addresses

udacity.tw maps to four IP numbers: 2606:4700:3034::6815:2b37, 2606:4700:3034::ac43:dd28, 104.21.43.55 and 172.67.221.40.

Other host names, for instance qtc-energy.com, laser114.com, dandh-windows.co.uk, web-designz.com and amccd.com share IP numbers with udacity.tw.

Name Servers

Two name servers ingrid.ns.cloudflare.com and kai.ns.cloudflare.com handle delegation for udacity.tw.

udacity.tw uses the same name server setup as other domains, for example udanxuexi.org, udacity.pt, nanodegree.cn, udasity.org and youdasity.mobi.

udacity.tw partially shares name servers with other domains; examples include whiskyapp.net, mussiocardenas.com, pctoday.de.com, icompassioninter.com and focalstud.io.

These name servers commonly accompany noel.ns.cloudflare.com, joan.ns.cloudflare.com, leah.ns.cloudflare.com and toby.ns.cloudflare.com.

Host names with six IP numbers: ingrid.ns.cloudflare.com points to: 2606:4700:50::adf5:3aa5, 2803:f800:50::6ca2:c0a5, 2a06:98c1:50::ac40:20a5, 108.162.192.165, 172.64.32.165 and 173.245.58.165; kai.ns.cloudflare.com points to: 2606:4700:58::adf5:3bbc, 2803:f800:50::6ca2:c1bc, 2a06:98c1:50::ac40:21bc, 108.162.193.188, 172.64.33.188 and 173.245.59.188.