Subdomain Finder
Subdomain Finder Tool
One of the most thorough solutions available, combining advanced passive and active scanning techniques to uncover assets with high accuracy.
Quickly map out the full external attack surface of any target, with detailed reports that include IP addresses and visual screenshots of all discovered web assets. Results can be easily exported in CSV or JSON format for seamless analysis and integration into your workflow.
Designed for security professionals, researchers, and developers alike, the Subdomain Finder Tool streamlines reconnaissance efforts and supports a wide range of use cases such as vulnerability assessments and asset inventory management. Its scalable architecture ensures fast and reliable performance even when scanning large organizations with thousands of domains.
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
More Features Coming
We're constantly building new features to enhance your subdomain discovery experience. Stay tuned!
Designed For:
Our subdomain finder focuses on clarity and accuracy, helping security professionals uncover exposed assets and understand the full scope of a target’s digital presence. It provides detailed visibility into domains, IP addresses, and active web content, making it easier to prioritize findings, report vulnerabilities, and plan the next steps in your security assessment.
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 overlook.
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 is used for development, testing, marketing, 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 highly effective.
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 uncover 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 focused network analysis to identify 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
