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
- Zero external pip dependencies (Python 3 standard library only).
- Automatic domain target cleaning (strips schemes, ports, and subpaths).
- Concurrent DNS resolution (--resolve --threads 25).
- Standard input (stdin) pipeline integration for Unix pipes.