Subdomain Finder
A powerful asset discovery tool combining advanced passive and active scanning to accurately map any target's attack surface
Generate detailed reports with IP addresses, screenshots, and exportable results (CSV/JSON) for seamless analysis and integration
Built for security professionals, researchers, and developers, the Subdomain Finder Tool accelerates reconnaissance, scales effortlessly to large environments, and supports use cases from penetration testing to asset inventory
Key Features
Advanced Scanning
Light and Deep scan in one tool using both passive and active scanning techniques to give the most accurate results
Screenshot Capture
Captures screenshots of all web assets to make it easy to quickly swift though available subdomains
Dashboard Access
Our detailed dashboard gives you access to all your current and past scans, making results searchable and sortable
Export Results
Export results to CSV and JSON format for detailed overview of scanned assets
What Is a Subdomain
A subdomain is a part of a larger domain name and is often used to organize different sections of a website.
Common Examples:
- •blog.example.com — Company blog
- •store.example.com — Online shopping
- •dev.example.com — Dev environment
While subdomains are useful for structuring websites, they can also be easy to forget.
If not properly secured, subdomains may expose hidden services or legacy systems, which can become potential entry points for attackers.
That's why discovering and monitoring subdomains is an important step in protecting your online presence.
Know Your Subdomains
Each subdomain you create increases the number of entry points into your systems.
Whether it's used for development, testing, or older applications, a forgotten or poorly configured subdomain can become an easy target for attackers.
Subdomains often host different services, have separate access controls, or link to third-party tools. If one is not properly secured or monitored, it can expose data, open the door to attackers, or even be taken over.
By keeping track of your subdomains, you gain better control over your public-facing infrastructure. It helps reduce security risks, improves your visibility, and supports both compliance and incident response efforts.
How We Identify Subdomains
Our subdomain discovery process is designed to be thorough, structured, and privacy-respecting.
We start by gathering publicly available information from reliable sources to find known subdomains associated with your domain. After the initial discovery, we expand our search using intelligent techniques that help identify hidden or lesser-known subdomains that might not be easily visible through conventional methods.
Each potential subdomain is then carefully validated through real-time resolution checks to confirm its existence and activity. Once validated, we conduct deeper analysis to discover additional details, such as active services, providing a deeper understanding of your external surface.
By combining these layers of discovery and validation, we deliver a comprehensive and accurate map of your domain's presence online.
Our 3-Step Process
Initial Discovery
Gathering publicly available information from reliable sources
Expanded Exploration
Intelligent techniques to uncover hidden subdomains
Validation and Analysis
Resolution checks and focused network analysis
Our subdomain finder delivers clear, accurate insights to help security professionals identify exposed assets and map a target's digital presence. It offers detailed visibility into domains, IPs, and web content, enabling better prioritization, reporting, and security assessments.