Subdomain Finder

Subdomain Finder

ℹ️ About Subdomain Finder
This tool scans a target domain hostname against a wordlist of the most common subdomains (e.g. www, mail, api, dev) to discover active server mapping points. Explore your target host namespace footprint instantly.

Subdomain Scans for

Below are the active resolved subdomains found for this host.

Scanning host namespaces and mapping subdomains...
Features

Why Scan Subdomains?

Audit DNS architectures, uncover developer staging systems, or discover forgotten server endpoints.

🔍

Namespace Enumeration

Scans against a predefined list of the 50 most common subdomain prefixes in parallel.

📡

DNS Resolution

Verifies host viability through real-time DNS A-record queries and returns resolved IPs.

📑

Saved History Swapping

Keep track of previously audited domain tabs to view details without running repeated queries.

💻

Developer Tooling Integration

Locate API endpoints, staging environments, CDN hosts, and mail servers of a target domain.

⚡

Staging Site Detection

Helps discover staging, testing, and development environments that are not indexable.

🔗

CNAME Redirection Mapping

Identifies aliases and maps them back to their primary hosting structures.

FAQ

Frequently Asked Questions

Find quick answers to common questions regarding subdomain discovery and DNS namespace audits.

A subdomain is a domain that is part of a larger domain. For example, mail.google.com and dev.google.com are subdomains of google.com.

Finding subdomains helps identify hidden services, staging sites, or CDN nodes. This is extremely useful for webmasters checking their own DNS setup, and for security researchers mapping a website's attack surface.

This tool searches using a wordlist of the 50 most common prefixes. It can find standard subdomains, but custom or randomized subdomains may not be detected unless they are in our target scan list.

No, unannounced or custom subdomains configured dynamically without DNS history or wordlist matches cannot be found without brute-forcing.

A wildcard subdomain (*.domain.com) is a DNS record that routes all requests for non-existent subdomains to a single designated host.
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