Domains GitHub Repositories (2026) · Open Source Tools

Free domain registration and practical DNS learning resources for everyone.

Grab your own cool 'runs-on.dev' subdomain to use for free forever.

+30,000 free and disposable email domains in a single list, validated against DNS every day.

Community-maintained registry for free subdomains — 100% free

Database of Internet places. Mostly domains

DomainMOD is an open source application written in PHP & MySQL used to manage your domains and other internet assets in a central location. DomainMOD also includes a Data Warehouse framework that allows you to import your web server data so that you can view, export, and report on your live data.

Real-time phishing & scam domain blocklist - 205k+ curated threats, 1M+ community, free API, multiple formats

A big list of free subdomains for personal websites, portfolios, open-source projects, and other online projects.

Scan domains and receive advice based on their BIMI, DKIM, DMARC, and SPF records

A collection of unified blocklists designed to provide complete filtering capabilities for different online threats. Curated from multiple sources (click SOURCES.md to view), these blocklists offer a robust solution for blocking ads, malware, trackers, and other unwanted content.

Prometheus WHOIS domain details exporter.

Ruby wrapper for the OpenSRS API