FAK LABSubdomain Finder

Subdomain Finder

FAK LAB discovery, DNS verification and intelligent result processing in one trusted workflow.

Scan a public domain

Enter a domain only—no protocol, port or path.

Passive sources only. Use results for assets you own or are authorized to assess.

FAK LAB engine

Preparing…

Discovery results

0unique hosts
0visible
0engine stages
0verified DNS records

How the FAK LAB Discovery Engine works

Your domain is normalized and processed by a first-party FAK LAB API. The engine collects public hostname intelligence, removes invalid or out-of-scope entries, performs independent DNS verification, merges duplicates and streams progress directly to this page. Strong scans are cached temporarily at Cloudflare’s edge; weak or incomplete scans are not allowed to pollute the result cache.

Designed for useful, trustworthy results

The interface reports the health of the FAK LAB workflow instead of exposing internal dependencies. Results clearly distinguish indexed hostnames from DNS-verified hosts. Filter large result sets locally and export the current view as CSV or JSON without another API request.

Important: no internet discovery system can guarantee a complete inventory, and a discovered hostname may be historical. Confirm findings within your authorized scope before relying on them.

Common use cases