4u.cool
Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.
Run a live full scan of 4u.cool
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
Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.
| Subdomain | Resolves to | Last seen |
|---|---|---|
| finlandia.4u.cool | 2026-07-15 00:14:41.774 | |
| litwa.4u.cool | 2026-07-18 08:12:10.177 | |
| wiadomosci.4u.cool | 2026-07-26 20:04:11.963 | |
| sip.4u.cool | 2026-06-02 18:22:33.983 | |
| francja.4u.cool | 2026-06-22 09:39:16.569 | |
| holandia.4u.cool | 2026-07-26 14:44:39.795 | |
| nauka.jezyka.4u.cool | 2026-07-28 13:32:41.076 | |
| nazwa.4u.cool | 2026-06-01 09:19:52.967 | |
| projekt.4u.cool | 2026-07-17 16:35:40.611 | |
| travel.4u.cool | 2026-07-22 07:13:46.637 | |
| twoja.firma.4u.cool | 2026-06-16 08:21:49.126 | |
| www.francja.4u.cool | 2026-06-23 05:40:49.320 | |
| www.islandia.4u.cool | 2026-07-20 23:57:12.309 | |
| www.norwegia.4u.cool | 2026-07-19 21:21:42.266 | |
| www.petsitters.4u.cool | 2026-06-15 12:22:51.986 | |
| www.rosja.4u.cool | 2026-06-19 04:39:43.687 | |
| www.travel.4u.cool | 2026-06-17 01:12:36.868 | |
| belgia.4u.cool | 1970-01-01 00:00:00.000 | |
| galeria.4u.cool | 1970-01-01 00:00:00.000 | |
| islandia.4u.cool | 1970-01-01 00:00:00.000 | |
| mdmcrew.4u.cool | 1970-01-01 00:00:00.000 | |
| mrzezyno.4u.cool | 1970-01-01 00:00:00.000 | |
| rosja.4u.cool | 1970-01-01 00:00:00.000 | |
| salon.fryzjerski.4u.cool | 1970-01-01 00:00:00.000 | |
| ukraina.4u.cool | 1970-01-01 00:00:00.000 | |
| ventha.4u.cool | 1970-01-01 00:00:00.000 | |
| www.4u.cool | 1970-01-01 00:00:00.000 | |
| www.finlandia.4u.cool | 1970-01-01 00:00:00.000 | |
| www.niemcy.4u.cool | 1970-01-01 00:00:00.000 | |
| www.portugalia.4u.cool | 1970-01-01 00:00:00.000 | |
| www.sklep.4u.cool | 1970-01-01 00:00:00.000 | |
| www.szwajcaria.4u.cool | 1970-01-01 00:00:00.000 | |
| www.ukraina.4u.cool | 1970-01-01 00:00:00.000 | |
| www.ventha.4u.cool | 1970-01-01 00:00:00.000 |
Tech Stack
Tech detection pending
Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.
TLS Certificates
Certificate observations pending
TLS certs naming this domain in subject or SANs will appear here as our scan-layer catches them.
IPs Citing This Domain
No citing IPs found yet
As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.
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
Domain timeline pending
Passive-DNS history accumulates as our forward-DNS crawler observes A/AAAA/MX/NS/TXT records over time.