Many organizations have dozens (or hundreds) of subdomains. Not all are active, but some may expose sensitive apps, staging servers, or forgotten portals.
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Subdomains are extra hostnames under a main domain that often hide staging sites, admin panels, or forgotten apps valuable targets in recon for testers and researchers. But many are dead or parked, so after enumeration you should filter for active subdomains that actually respond
In this article, we’ll cover:
- What subdomain enumeration is
- Why it’s important
- Tools for subdomain discovery
- How to filter for active and live subdomains
So,
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Wokay without wasting 1 more word let’s dig into the learning