ctfd.cloud - robtex.com

ctfd.cloud

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:1e66🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:acbd🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.30.102Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.172.189🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdeb.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3a5c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdeb.ns.cloudflare.com
A2803:f800:50::6ca2:c05c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdeb.ns.cloudflare.com
A2a06:98c1:50::ac40:205c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdeb.ns.cloudflare.com
A108.162.192.92🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdeb.ns.cloudflare.com
A172.64.32.92🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdeb.ns.cloudflare.com
A173.245.58.92🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdeb.ns.cloudflare.com
NSdonald.ns.cloudflare.com
A2606:4700:58::adf5:3b9e🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdonald.ns.cloudflare.com
A2803:f800:50::6ca2:c19e🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdonald.ns.cloudflare.com
A2a06:98c1:50::ac40:219e🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdonald.ns.cloudflare.com
A108.162.193.158🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdonald.ns.cloudflare.com
A172.64.33.158🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdonald.ns.cloudflare.com
A173.245.59.158🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdonald.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.30.102, 172.67.172.189
IPv6 hints2606:4700:3032::6815:1e66, 2606:4700:3033::ac43:acbd
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=158, name=cloudflare-ech.com
SOAdeb.ns.cloudflare.comdns@cloudflare.com serial=2400883965

cloud

DNSSEC🔒 Signed (DS record present)
NSns01.trs-dns.com ⭐
NSns.trs-dns.com
NSns01.trs-dns.net
NSns10.trs-dns.info
NSns10.trs-dns.org
SOAns.trs-dns.comtrs-ops@tucows.com serial=1776265541

Same first word

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DNS History

6 records (6 active, 0 former)

NSdeb.ns.cloudflare.comdonald.ns.cloudflare.comA104.21.30.102172.67.172.1892606:4700:3032::6815:1e662606:4700:3033::ac43:acbd
●NSdeb.ns.cloudflare.com2026-04-14 → 2026-04-15 · 2 obs
● 2026-04-14 01:08:44
● 2026-04-15 15:28:36
●NSdonald.ns.cloudflare.com2026-04-14 → 2026-04-15 · 2 obs
● 2026-04-14 01:08:44
● 2026-04-15 15:28:36
●A104.21.30.1022026-04-14 → 2026-04-15 · 2 obs
● 2026-04-14 01:08:44
● 2026-04-15 15:28:36
●A172.67.172.1892026-04-14 → 2026-04-15 · 2 obs
● 2026-04-14 01:08:44
● 2026-04-15 15:28:36
●A2606:4700:3032::6815:1e662026-04-14 → 2026-04-15 · 2 obs
● 2026-04-14 01:08:44
● 2026-04-15 15:28:36
●A2606:4700:3033::ac43:acbd2026-04-14 → 2026-04-15 · 2 obs
● 2026-04-14 01:08:44
● 2026-04-15 15:28:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cloudns10.trs-dns.info, ns01.trs-dns.com, ns01.trs-dns.net, ns10.trs-dns.org8 records
ctfd.clouddonald.ns.cloudflare.com, deb.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.59.158

NS records: donald.ns.cloudflare.com, deb.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctfd.cloud (unsigned zone)

⏱️ Timing

Total: 789ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.30.102, 172.67.172.189
AAAA22606:4700:3033::ac43:acbd, 2606:4700:3032::6815:1e66
NS2deb.ns.cloudflare.com, donald.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1deb.ns.cloudflare.com dns.cloudflare.com

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns10.trs-dns.info, ns10.trs-dns.org, ns01.trs-dns.net...)

Analysis

IP Addresses

Four IP numbers are pointed to by ctfd.cloud: 2606:4700:3032::6815:1e66, 2606:4700:3033::ac43:acbd, 104.21.30.102 and 172.67.172.189.

other host names including dlr.tools, epei.mx, www.alexis17nice.com, ylcjlw.com and aresfss.com share IP numbers with ctfd.cloud.

Name Servers

ctfd.cloud is delegated to two name servers deb.ns.cloudflare.com and donald.ns.cloudflare.com.

ctfd.cloud shares the same name server setup as other domains, for instance moonstake.io, antarcticaam.app, elderly.com, mrm.land and visitcentralgreece.com.

ctfd.cloud at least partially shares name servers with other domains, for instance valmich.info, insightplusdynamics.digital, zthhb.com, ccbck.com and coalclick.com.

These name servers are commonly used alongside magnolia.ns.cloudflare.com and leia.ns.cloudflare.com.

Host names with six IP numbers:

Host name deb.ns.cloudflare.com points to: 2606:4700:50::adf5:3a5c, 2803:f800:50::6ca2:c05c, 2a06:98c1:50::ac40:205c, 108.162.192.92, 172.64.32.92 and 173.245.58.92.

Host name donald.ns.cloudflare.com points to: 2606:4700:58::adf5:3b9e, 2803:f800:50::6ca2:c19e, 2a06:98c1:50::ac40:219e, 108.162.193.158, 172.64.33.158 and 173.245.59.158.