4fs.dev
Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.
Run a live full scan of 4fs.dev
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 |
|---|---|---|
| 4fs.dev | 2026-08-27 05:32:57.863 |
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
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 |
|---|---|---|---|
| TXT | v=spf1 include:_spf.mx.cloudflare.net ~all | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| MX | 82 route2.mx.cloudflare.net | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| A | 104.21.54.49 | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| MX | 90 route3.mx.cloudflare.net | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| TXT | google-site-verification=_CQtWnC1dd07yT_K9aC9et0soWDjZlELHUGd6UhLQy4 | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| AAAA | 2606:4700:3033::6815:3631 | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| TXT | google-site-verification=HOCEJcMYo-Ru-mGJ7QLnQJ4tdWWIyqBIzp1ZmfesC-s | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| AAAA | 2606:4700:3037::ac43:dfd6 | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| MX | 7 route1.mx.cloudflare.net | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| TXT | _gitlab-pages-verification-code.4fs.dev TXT gitlab-pages-verification-code=b93a3bd78283bcb4137a3c22eae1c9f5 | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| NS | vivienne.ns.cloudflare.com | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| NS | ajay.ns.cloudflare.com | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |
| A | 172.67.223.214 | 2026-07-23 01:13:49.306 | 2026-08-27 05:32:57.863 |