ctf.0xfun.org - robtex.com

ctf.0xfun.org

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:b9ea🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:2875🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.40.117Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.185.234🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
MXmxa.mailgun.org ⭐
A34.149.254.5🇺🇸 Google34.148.0.0/14
PTR5.254.149.34.bc.googleusercontent.com
MXmxb.mailgun.org ⭐
A34.36.182.139🇺🇸 Google34.32.0.0/11
PTR139.182.36.34.bc.googleusercontent.com
TXTv=spf1 include:mailgun.org ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.40.117, 172.67.185.234
IPv6 hints2606:4700:3033::ac43:b9ea, 2606:4700:3036::6815:2875
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=134, name=cloudflare-ech.com

0xfun.org

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:b9ea🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:2875🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.40.117Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.185.234🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NScesar.ns.cloudflare.com ⭐
NSdell.ns.cloudflare.com
MXroute3.mx.cloudflare.net ⭐
MXroute1.mx.cloudflare.net(90)
MXroute2.mx.cloudflare.net(94)
TXTgoogle-site-verification=_nGtf9ZvtHMQ9j2MrVXYXdbDW9OsXcRKsJxVNTQJVSU
TXTv=spf1 include:_spf.mx.cloudflare.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.40.117, 172.67.185.234
IPv6 hints2606:4700:3033::ac43:b9ea, 2606:4700:3036::6815:2875
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=134, name=cloudflare-ech.com
SOAcesar.ns.cloudflare.comdns@cloudflare.com serial=2402226692

Same first word

ctf.cz
ctf.com.cn
ctf.is
ctf.link
ctf.academy
ctf.center
ctf.hk
ctf.capital
ctf.co.jp
ctf.co.il
ctf.space
ctf.in
ctf.com.au
ctf.today
ctf.rocks
ctf.ca
ctf.es
ctf.com.ua
ctf.uz
ctf.school
ctf.me
ctf.wtf
ctf.network
ctf.com.tr
ctf.us
ctf.jp
ctf.ru
ctf.fail
ctf.moscow
ctf.at
ctf.si
ctf.com.tw
ctf.bz
ctf.com
ctf.team
ctf.solutions
ctf.info
ctf.ac.cn
ctf.institute
ctf.ch
ctf.vegas
ctf.co.nz
ctf.org.au
ctf.ee
ctf.cl
ctf.cc
ctf.eu
ctf.qa
ctf.net
ctf.site
ctf.horse
ctf.show
ctf.com.br
ctf.nl
ctf.co.in
ctf.zone
ctf.fi
ctf.pt
ctf.su
ctf.io
ctf.it
ctf.tv
ctf.or.kr
ctf.expert
ctf.life
ctf.ir
ctf.de
ctf.company
ctf.pl
ctf.co
ctf.uk.com
ctf.ma
ctf.fyi
ctf.pp.ua
ctf.org
ctf.watch
ctf.events
ctf.edu.tr
ctf.fr
ctf.ae
ctf.wa.gov.au
ctf.com.pt
ctf.biz
ctf.org.in
ctf.lu
ctf.be
ctf.no
ctf.land
ctf.cn

Similar names

tcf.co.in
tfc.co
ftc.es
fct.i234.me
tfc.ie
ftc.uz
fct.com.cn
tcf.com.tw
cft.cw
tfc.agency
ftc.biz
cft.info
tcf.us
cft.re
ftc.cc
cft.ie
cft.de
fct.eu
cft.cz
tfc.es
tfc.net
ftc.ag
ftc.co.jp
tcf.org.hk
tcf.ca
tfc.ch
fct.ne.jp
ftc.be
cft.org.za
tcf.net.br
fct.sk
tfc.info
cft.me
fct.co
cft.report
tfc.gr
tcf.no
tcf.org.uk
fct.ee
tcf.tv
fct.fr
fct.ru
ftc.ca
tfc.no
tcf.com
tcf.pl
ftc.ru
tfc.pt
fct.nl
ftc.me
fct.ca
ftc.su
tcf.to
fct.be
ftc.net.co
tfc.uk
fct.de
cft.ro
fct.or.tz
tcf.cz
ftc.nu
cft.ca
tcf.biz
tfc.com.vn
ftc.net
tfc.digital
fct.org.nz
tfc.fm
tcf.gmbh
cft.at
ftc.se
tcf.team
cft.com
tfc.cz
fct.uk.com
ftc.cards
cft.group
tcf.ir
cft.fi
tfc.sk
cft.edu.pl

DNS History

6 records (6 active, 0 former)

MXmxa.mailgun.orgmxb.mailgun.orgA104.21.40.117172.67.185.2342606:4700:3033::ac43:b9ea2606:4700:3036::6815:2875
●MXmxa.mailgun.org2026-03-25 → 2026-04-27 · 2 obs
● 2026-03-25 08:16:32
● 2026-04-27 03:32:42
●MXmxb.mailgun.org2026-03-25 → 2026-04-27 · 2 obs
● 2026-03-25 08:16:32
● 2026-04-27 03:32:42
●A104.21.40.1172026-03-25 → 2026-04-27 · 2 obs
● 2026-03-25 08:16:32
● 2026-04-27 03:32:42
●A172.67.185.2342026-03-25 → 2026-04-27 · 2 obs
● 2026-03-25 08:16:32
● 2026-04-27 03:32:42
●A2606:4700:3033::ac43:b9ea2026-03-25 → 2026-04-27 · 2 obs
● 2026-03-25 08:16:32
● 2026-04-27 03:32:42
●A2606:4700:3036::6815:28752026-03-25 → 2026-04-27 · 2 obs
● 2026-03-25 08:16:32
● 2026-04-27 03:32:42

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, b0.org.afilias-nst.org, d0.org.afilias-nst.org-
0xfun.orgdell.ns.cloudflare.com, cesar.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.94

NS records: dell.ns.cloudflare.com, cesar.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 0xfun.org (unsigned zone)

⏱️ Timing

Total: 563ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.185.234, 104.21.40.117
AAAA22606:4700:3036::6815:2875, 2606:4700:3033::ac43:b9ea
MX2mxa.mailgun.org (pri: 10), mxb.mailgun.org (pri: 10)
TXT1v=spf1 include:mailgun.org ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

ctf.0xfun.org points to four IP numbers: 2606:4700:3033::ac43:b9ea, 2606:4700:3036::6815:2875, 104.21.40.117 and 172.67.185.234.

Other host names, for instance d.a17-112-152-32.provaforum.flarum.cloud, olivendo.be, 892-turkish-airlines-berlin-office.html.d.browseusers.provaforum.flarum.cloud, www.peac-ac.org and raneelee.ca share IP numbers with ctf.0xfun.org.

Mail Servers

ctf.0xfun.org is handled by two mail servers: mxa.mailgun.org and mxb.mailgun.org.

ctf.0xfun.org shares the same mail server setup as other domains, including pecanmail.com, 110plazareporting.com, safetybrick.com, cdwyland.net and centrecycleworks.com.

ctf.0xfun.org shares some mail servers with other domains, including eventcombo.net, yaseralnajjar.com, greavesconstruction.com, demnet.co.uk and 1profire.com.

Host names with one IP number:

mxa.mailgun.org points to: 34.149.254.5.

mxb.mailgun.org points to: 34.36.182.139.