subfinder is a subdomain discovery tool that returns valid subdomains for websites, using passive online sources. It has a simple, modular architecture and is optimized for speed. subfinder is built for doing one thing only - passive subdomain enumeration, and it does that very well.

Installation

subfinder requires go1.18 to install successfully. Run the following command to install the latest version:

Usage

Running Subfinder

To run the tool on a target, just use the following command.

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