21.ndteach.com - robtex.com

21.ndteach.com

DNSSEC⚠️ Not signed
A104.21.43.79Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.175.185🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.43.79, 172.67.175.185
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=186, name=cloudflare-ech.com

ndteach.com

DNSSEC⚠️ Not signed
A104.21.43.79Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.175.185🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSaddilyn.ns.cloudflare.com ⭐
NSmichael.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.43.79, 172.67.175.185
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=186, name=cloudflare-ech.com
SOAaddilyn.ns.cloudflare.comdns@cloudflare.com serial=2400516045

Subdomains

104.21.ndteach.com

Same first word

21.diamonds
21.cn
21.de
21.training
21.ca
21.org
21.com.tw
21.co.uk
21.vc
21.am
21.im
21.rs
21.amsterdam
21.com
21.bet
21.center
21.kz
21.fyi
21.cm
21.web.app
21.su
21.network
21.si
21.ph
21.is
21.be
21.com.ua
21.pe
21.edu.ar
21.gg
21.technology
21.capital
21.dk
21.email
21.ai
21.wf
21.sk
21.zone
21.immo
21.hk
21.cz
21.academy
21.style
21.school
21.(0x787878)
21.ink
21.pictures
21.show
21.nl
21.agency
21.co
21.biz
21.lv
21.uk
21.ru
21.co.za
21.co.tz
21.finance
21.re
21.co.com
21.ax
21.nu
21.business
21.casino
21.red
21.pl
21.ee
21.com.vn
21.partners
21.to
21.ie
21.photos
21.sb
21.cc
21.city
21.gs
21.fr
21.live
21.by
21.com.es
21.net.cn
21.eu
21.run
21.pw
21.se
21.org.cn
21.chat
21.net
21.game
21.la
21.ag

Similar names

12.sg
12.life
12.network
12.dk
12.com.cn
12.org.ru
12.cx
12.org
12.nu
12.gl
12.vip
12.net.cn
12.gr
12.fyi
12.ai
12.tt
12.hk
12.gs
12.amsterdam
12.fr
12.vc
12.am
12.agency
12.digital
12.ac.cn
12.com.vn
12.lt
12.si
12.cfd
12.tf
12.pw
12.be
12.fi
12.cc
12.is
12.chat
12.netlify.app
12.app
12.solutions
12.dyndns.tv
12.cm
12.pl
12.world
12.by
12.org.ua
12.works
12.cn
12.uz

DNS History

3 records (2 active, 1 former)

20162017201820192020202120222023202420252026A104.21.43.79172.67.175.185109.68.33.25
●A104.21.43.792026-03-30 → 2026-04-13 · 3 obs
○ 2016-07-19 18:10:30
● 2026-03-30 11:11:10
● 2026-04-13 19:14:58
○A109.68.33.252015-07-15 → 2016-07-19 · 4 obs
● 2015-07-15 01:20:50
● 2016-07-19 18:10:30
○ 2026-03-30 11:11:10
○ 2026-04-13 19:14:58
●A172.67.175.1852026-03-30 → 2026-04-13 · 3 obs
○ 2016-07-19 18:10:30
● 2026-03-30 11:11:10
● 2026-04-13 19:14:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comk.gtld-servers.net, l.gtld-servers.net, d.gtld-servers.net, j.gtld-servers.net...-
ndteach.comaddilyn.ns.cloudflare.com, michael.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.194.217

NS records: addilyn.ns.cloudflare.com, michael.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ndteach.com (unsigned zone)

⏱️ Timing

Total: 106ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.175.185, 104.21.43.79
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (addilyn.ns.cloudflare.com, addilyn.ns.cloudflare.com, addilyn.ns.cloudflare.com...)

Analysis

Hierarchy

21.ndteach.com is parent of 104.21.ndteach.com.

IP Addresses

21.ndteach.com points to two IP numbers: 104.21.43.79 and 172.67.175.185.

Other host names, for instance betuah.com, www.asb-art.com, nourishcloud.digital, aebcare.com and fuehrerscheinn.com share IP numbers with 21.ndteach.com.