> subchk / subfinder

Fast, standalone subdomain enumeration CLI tool and API client.

What is it?

subchk (also aliased as subfinder) is a zero-dependency CLI tool built using Python standard libraries. It queries subdomain enumeration results hosted at checkdomain.dineshkorukonda.online, supports concurrent active DNS resolution (--resolve), and pipes cleanly into security tools like httpx, anew, and nuclei.

Linux / macOS Installation

curl -sSL https://raw.githubusercontent.com/dineshkorukonda/subfinder/main/install.sh | bash

Windows Installation (PowerShell)

iwr -useb https://raw.githubusercontent.com/dineshkorukonda/subfinder/main/install.ps1 | iex

Usage Examples

Query subdomains for apex domain:

subchk klef.in

Using subfinder command alias:

subfinder klef.in

Active DNS resolution & pipeline piping:

cat domains.txt | subchk -s --resolve | httpx

Features