`challengeworld.co.uk`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:2ff3^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:ae8e^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.47.243^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.174.142^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jack.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b79^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jack.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c179^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jack.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2179^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jack.ns.cloudflare.com`
		A	108.162.193.121^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jack.ns.cloudflare.com`
		A	172.64.33.121^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jack.ns.cloudflare.com`
		A	173.245.59.121^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jack.ns.cloudflare.com`
NS	`jillian.ns.cloudflare.com`
		A	2606:4700:50::a29f:262c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jillian.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c22c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jillian.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:222c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jillian.ns.cloudflare.com`
		A	108.162.194.44^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jillian.ns.cloudflare.com`
		A	162.159.38.44^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jillian.ns.cloudflare.com`
		A	172.64.34.44^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jillian.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.47.243, 172.67.174.142
		IPv6 hints	2606:4700:3031::6815:2ff3, 2606:4700:3036::ac43:ae8e
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=165, name=cloudflare-ech.com
SOA	`jack.ns.cloudflare.com`dns@cloudflare.com serial=2399604854

`co.uk`

	DNSSEC	⚠️ Not signed
	NS	`dns1.nic.uk` ⭐ ⚠️ Not in parent delegation
	NS	`dns2.nic.uk` ⚠️ Not in parent delegation
	NS	`dns3.nic.uk` ⚠️ Not in parent delegation
	NS	`dns4.nic.uk` ⚠️ Not in parent delegation
	NS	`nsa.nic.uk` ⚠️ Not in parent delegation
	NS	`nsb.nic.uk` ⚠️ Not in parent delegation
	NS	`nsc.nic.uk` ⚠️ Not in parent delegation
	NS	`nsd.nic.uk` ⚠️ Not in parent delegation
	SOA	`dns1.nic.uk`hostmaster@nominet.org.uk serial=1776208600

rank #187256 globally
rank #16615 in the tld
rank #174325 globally
rank #14731 in the tld
WOT: SAFE (74/100)

Same first word

challengeworld.co.kr

challengeworld.co.uk

Similar names

worldchallenge.com

worldchallenge.org

DNS History

6 records (6 active, 0 former)

●NSjack.ns.cloudflare.com2026-04-12 → 2026-04-14 · 2 obs

● 2026-04-12 04:57:04
● 2026-04-14 23:30:38

●NSjillian.ns.cloudflare.com2026-04-12 → 2026-04-14 · 2 obs

● 2026-04-12 04:57:04
● 2026-04-14 23:30:38

●A104.21.47.2432026-04-12 → 2026-04-14 · 2 obs

● 2026-04-12 04:57:04
● 2026-04-14 23:30:38

●A172.67.174.1422026-04-12 → 2026-04-14 · 2 obs

● 2026-04-12 04:57:04
● 2026-04-14 23:30:38

●A2606:4700:3031::6815:2ff32026-04-12 → 2026-04-14 · 2 obs

● 2026-04-12 04:57:04
● 2026-04-14 23:30:38

●A2606:4700:3036::ac43:ae8e2026-04-12 → 2026-04-14 · 2 obs

● 2026-04-12 04:57:04
● 2026-04-14 23:30:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
uk	dns4.nic.uk, nsa.nic.uk, nsb.nic.uk, nsd.nic.uk...	-
challengeworld.co.uk	jillian.ns.cloudflare.com, jack.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.121

NS records: jillian.ns.cloudflare.com, jack.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for challengeworld.co.uk (unsigned zone)

⏱️ Timing

Total: 365ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.174.142, 104.21.47.243`
AAAA	2	`2606:4700:3031::6815:2ff3, 2606:4700:3036::ac43:ae8e`
NS	2	`jack.ns.cloudflare.com, jillian.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`jack.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

Four IP numbers are pointed to by challengeworld.co.uk: 2606:4700:3031::6815:2ff3, 2606:4700:3036::ac43:ae8e, 104.21.47.243 and 172.67.174.142.

other host names including buildpoker.nl, pwlcfranchise.com, sonnyscamp.com, u1.yesichat.com and www.h9061.cn share IP numbers with challengeworld.co.uk.

Name Servers

challengeworld.co.uk is delegated to two name servers jack.ns.cloudflare.com and jillian.ns.cloudflare.com.

challengeworld.co.uk shares the same name server setup as other domains, for instance xye4.com, werwolfrust.com, insightdigest.co.uk, katiemantwageorge.com and ok977.com.

challengeworld.co.uk at least partially shares name servers with other domains, for instance wxxtyhb.com, interkemi.com, mornpenchiro.com.au, onlinecasinosite.com.au and qisj.com.

these name servers are commonly used alongside gabriel.ns.cloudflare.com.

Host names with six IP numbers:

Host name jack.ns.cloudflare.com points to: 2606:4700:58::adf5:3b79, 2803:f800:50::6ca2:c179, 2a06:98c1:50::ac40:2179, 108.162.193.121, 172.64.33.121 and 173.245.59.121.

Host name jillian.ns.cloudflare.com points to: 2606:4700:50::a29f:262c, 2803:f800:50::6ca2:c22c, 2a06:98c1:50::ac40:222c, 108.162.194.44, 162.159.38.44 and 172.64.34.44.

challengeworld.co.uk - robtex.com