challenges.cloudflare.com
Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.
Run a live full scan of challenges.cloudflare.com
On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.
DNS Records
WHOIS / Registration
Registration data planned
Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.
Subdomains
Subdomain enumeration pending
Every subdomain ever issued a TLS cert under this apex — extracted from Certificate Transparency logs, our own scan observations and body references.
Tech Stack
Tech detection pending
Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.
TLS Certificates
IPs Citing This Domain
Hosts whose HTML body references this domain. Strong signal for origin/mirror/embed discovery.
Origin / IP-Leak
When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.
No origin-IP leaks detected (yet)
Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.
Threat Intelligence
Domain threat-intel pending
Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.
History
Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.
| Type | Value | First seen | Last seen |
|---|---|---|---|
| A | 104.18.95.41 | 2026-05-25 21:56:50.553 | 2026-07-28 20:31:39.973 |
| A | 104.18.94.41 | 2026-05-25 21:56:50.553 | 2026-07-28 20:31:39.973 |
| AAAA | 2606:4700::6812:5f29 | 2026-05-25 21:56:50.553 | 2026-07-28 20:31:39.973 |
| AAAA | 2606:4700::6812:5e29 | 2026-05-25 21:56:50.553 | 2026-07-28 20:31:39.973 |
| NS | chuck.ns.cloudflare.com | 2026-05-25 22:05:29.416 | 2026-07-28 20:31:39.973 |
| NS | carol.ns.cloudflare.com | 2026-05-25 22:05:29.416 | 2026-07-28 20:31:39.973 |
| TXT | ca3-ec83612a81d347f3bad44a4cd36ee54e | 2026-05-25 22:05:29.416 | 2026-07-28 20:31:39.973 |
| TXT | ca3-64f12aefd8ea4084b6f3f75071b24351 | 2026-05-25 22:05:29.416 | 2026-07-28 20:31:39.973 |