www.u21.com - robtex.com

www.u21.com

DNSSEC⚠️ Not signed
A208.98.40.33🇺🇸 SHARKTECH-1208.98.40.0/24
NSwww.www.u21.com ⭐
A208.98.40.100🇺🇸 SHARKTECH-1208.98.40.0/24
SOAwww.www.u21.comwww@u21.com 2008-08-03 #0

u21.com

DNSSEC⚠️ Not signed
A208.98.40.34🇺🇸 SHARKTECH-1208.98.40.0/24
NSwww.u21.com ⭐
NSns1.4.cn ⚠️ Not in zone NS records
NSns2.4.cn ⚠️ Not in zone NS records
SOAwww.u21.comu21@com 2008-08-03 #0

NS for

u21.com

Previously NS for

www.u21.com

Same first word

www.streaklinks.com
www.partners
www.nittedal.no
www.cloudns.nz
www.re
www.heavy.jp
www.is-a-musician.com
www.mielec.pl
www.123webseite.de
www.odessa.ua
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www.from-mi.com
www.loginto.me
www.is-a-nurse.com
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www.is-a-techie.com
www.com.kw
www.temp-dns.com
www.serveirc.com
www.sk
www.gov.ph
www.blogspot.re
www.streamlit.app
www.123website.ch
www.run
www.vossevangen.no
www.dyndns.tv
www.holy.jp
www.myjino.ru
www.4lima.ch
www.myshopify.com
www.kw
www.flier.jp
www.pe.gov.br
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www.si
www.blogspot.com.mt
www.byen.site
www.peewee.jp
www.nu
www.media
www.sandvikcoromant
www.rr.gov.br
www.is-a-linux-user.org
www.writesthisblog.com
www.gc.ca
www.hatenadiary.jp
www.gouv.ci
www.tennis
www.ilovecollege.info
www.freedesktop.org
www.gov.bb
www.co.at
www.dupont
www.dynalias.org
www.pt
www.support
www.blogspot.cl
www.jobs
www.vp4.me
www.servesarcasm.com
www.myddns.rocks
www.simplesite.com
www.actor
www.mit
www.gonna.jp
www.bir.ru
www.info
www.restaurant
www.blogspot.com
www.ht
www.lubin.pl
www.warmia.pl
www.capoo.jp
www.waw.pl
www.et
www.cl
www.asker.no
www.vg
www.blogspot.fi
www.s3-website-us-east-1.amazonaws.com
www.bing
www.dnsdojo.org
www.walter
www.sor-odal.no
www.dvrdns.org
www.girly.jp
www.forms.ac
www.com.im
www.kilo.jp
www.fastvps-server.com
www.lpages.co
www.dyndns.ws
www.gl
www.kozow.com
www.community
www.com.ar
www.lv
www.webredirect.org
www.mn

Similar names

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www.life
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www.photos
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www.barsy.menu
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www.viajes
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www.gitlab.io
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www.gov.ao
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www.cab
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www.blogspot.sk
www.ostroda.pl
www.engineer
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www.rzeszow.pl
www.uk.com

DNS History

8 records (2 active, 6 former)

20192020202120222023202420252026NSwww.www.u21.comwww.u21.comA208.98.40.33208.98.40.206208.98.40.74208.98.43.33208.98.43.77CNAMEu.dcoin.co
○NSwww.u21.com2018-07-06 → 2018-07-06 · 3 obs
● 2018-07-06 20:25:10
○ 2026-06-22 19:24:54
○ 2026-07-06 09:28:10
●NSwww.www.u21.com2026-06-22 → 2026-07-06 · 3 obs
○ 2018-07-06 20:25:10
● 2026-06-22 19:24:54
● 2026-07-06 09:28:10
○A208.98.40.2062026-06-27 → 2026-06-27 · 4 obs
○ 2026-06-26 16:05:32
● 2026-06-27 00:07:16
○ 2026-07-04 21:46:16
○ 2026-07-06 09:28:10
●A208.98.40.332026-07-06 → 2026-07-06 · 3 obs
○ 2026-07-04 21:46:16
● 2026-07-06 09:28:08
● 2026-07-06 09:28:10
○A208.98.40.742026-06-26 → 2026-06-26 · 4 obs
○ 2026-06-22 19:24:54
● 2026-06-26 16:05:32
○ 2026-06-27 00:07:16
○ 2026-07-06 09:28:10
○A208.98.43.332026-07-04 → 2026-07-04 · 4 obs
○ 2026-06-27 00:07:16
● 2026-07-04 21:46:16
○ 2026-07-06 09:28:08
○ 2026-07-06 09:28:10
○A208.98.43.772026-06-22 → 2026-06-22 · 3 obs
● 2026-06-22 19:24:54
○ 2026-06-26 16:05:32
○ 2026-07-06 09:28:10
○CNAMEu.dcoin.co2018-07-06 → 2018-07-06 · 3 obs
● 2018-07-06 20:25:10
○ 2026-06-22 19:24:54
○ 2026-07-06 09:28:10

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comd.gtld-servers.net, a.gtld-servers.net, j.gtld-servers.net, c.gtld-servers.net...-
u21.comns1.4.cn, ns2.4.cn-

✅ Authoritative Response

Server:208.98.43.66

NS records: ns1.4.cn, ns2.4.cn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for u21.com (unsigned zone)

⏱️ Timing

Total: 2010ms | Queries: -

📄 Records

TypeCountSample Data
A1208.98.40.33
SOA1www.www.u21.com www.u21.com

Analysis

Name Server Role

www.u21.com is a name server for u21.com.

ns1.4.cn, ns2.4.cn and www.u21.com are commonly seen together as name servers.

IP Addresses

www.u21.com resolves to one IP address: 208.98.40.33.

www.td11.com, www.dsty.cn, 20.100311.com and two other host names share IP numbers with www.u21.com.

Name Servers

www.u21.com has exactly one name server — www.www.u21.com.

www.www.u21.com resolves to 208.98.40.100 and no other IP number.