ns1.dc0.us - robtex.com

ns1.dc0.us

DNSSEC⚠️ Not signed
A104.21.91.37Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.209.131🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.91.37, 172.67.209.131
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=222, name=cloudflare-ech.com

dc0.us

DNSSEC⚠️ Not signed
A104.21.91.37Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.209.131🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSisla.ns.cloudflare.com ⭐
NSsid.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.91.37, 172.67.209.131
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=222, name=cloudflare-ech.com
SOAisla.ns.cloudflare.comdns@cloudflare.com serial=2403586362

Previously NS for

dc0.us

Same first word

ns1.gov.bh
ns1.ge
ns1.paas.hosted-by-previder.com
ns1.si
ns1.jelastic.saveincloud.net
ns1.altervista.org
ns1.v.ua
ns1.perspecta.cloud
ns1.tv
ns1.ch.trendhosting.cloud
ns1.com.ru
ns1.drud.us
ns1.org.kp
ns1.eu.org
ns1.com.au
ns1.km
ns1.dscloud.me
ns1.byen.site
ns1.csx.cc
ns1.whm.fr-par.scw.cloud
ns1.idf.il
ns1.keliweb.cloud
ns1.com.br
ns1.rep.kp
ns1.hk
ns1.in.ua
ns1.sekd1.beebyteapp.io
ns1.familyds.net
ns1.to.gov.br
ns1.work
ns1.mediatech.by
ns1.net.au
ns1.com.kp
ns1.alpha-myqnapcloud.com
ns1.dep.no
ns1.paas.massivegrid.com
ns1.mircloud.ru
ns1.familyds.com
ns1.glug.org.uk
ns1.pl
ns1.kapsi.fi
ns1.in
ns1.police.uk
ns1.yandexcloud.net
ns1.fun
ns1.zone
ns1.memset.net
ns1.kinghost.net
ns1.es
ns1.jc.neen.it
ns1.info.at
ns1.freedesktop.org
ns1.cz
ns1.gov.kp
ns1.org.ph
ns1.jelastic.dogado.eu
ns1.it
ns1.bg
ns1.onavstack.net
ns1.website
ns1.com
ns1.edu.bb
ns1.cn
ns1.fra1-de.cloudjiffy.net
ns1.mil.ru
ns1.com.ph
ns1.de
ns1.us.com
ns1.name
ns1.beep.pl
ns1.net
ns1.siteleaf.net
ns1.kr
ns1.co.kr
ns1.co.ca
ns1.mynascloud.com
ns1.pr.gov.br
ns1.id
ns1.k12.la.us
ns1.is
ns1.duckdns.org
ns1.shop
ns1.uni5.net
ns1.oxa.cloud
ns1.ibxos.it
ns1.gov.nr
ns1.jls-sto3.elastx.net
ns1.ch
ns1.paas.datacenter.fi
ns1.gov.me
ns1.edu.kp
ns1.gov.ao
ns1.com.co
ns1.myfritz.net
ns1.go.gov.br
ns1.jcloud.ik-server.com
ns1.dyndns.org
ns1.ro
ns1.am.gov.br
ns1.west1-us.cloudjiffy.net

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sn1.eu
ns1.es.gov.br
ns1.jls-sto1.elastx.net
ns1.eu
ns1.li
ns1.jcloud.kz
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ns1.myds.me
ns1.nhs.uk
ns1.whm.nl-ams.scw.cloud
ns1.fm
ns1.us.reclaim.cloud
ns1.online
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ns1.vg
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ns1.bz
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ns1.ie
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ns1.phx.enscaled.us
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ns1.mobi
ns1.co.tz
ns1.com.pa
ns1.rs.ba
n1s.se
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ns1.by
s1n.biz
1sn.org
n1s.de
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1ns.com.cn
s1n.fr
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1ns.de

DNS History

3 records (2 active, 1 former)

2017201820192020202120222023202420252026A104.21.91.37172.67.209.131150.107.29.42
●A104.21.91.372026-04-30 → 2026-05-11 · 3 obs
○ 2016-07-18 07:43:32
● 2026-04-30 11:14:20
● 2026-05-11 14:18:52
○A150.107.29.422016-07-18 → 2016-07-18 · 3 obs
● 2016-07-18 07:43:32
○ 2026-04-30 11:14:20
○ 2026-05-11 14:18:52
●A172.67.209.1312026-04-30 → 2026-05-11 · 3 obs
○ 2016-07-18 07:43:32
● 2026-04-30 11:14:20
● 2026-05-11 14:18:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usb.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us...-
dc0.usisla.ns.cloudflare.com, sid.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.193.143

NS records: isla.ns.cloudflare.com, sid.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dc0.us (unsigned zone)

⏱️ Timing

Total: 230ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.91.37, 172.67.209.131
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

ns1.dc0.us points to two IPs: 104.21.91.37 and 172.67.209.131.

Other host names including telefonkatalogen.biz, ronresch.com, www.k136136a1.top, betprimerise.us and admin.cribcut.com share IP numbers with ns1.dc0.us.