About Global DNS Checker

Global DNS Checker is a free DNS propagation checker that queries DNS records across 400+ DNS servers in 103 countries worldwide. It helps system administrators, web developers, and IT professionals verify that DNS changes have propagated globally.

How It Works

When you perform a DNS lookup, the tool simultaneously queries hundreds of DNS servers distributed across the globe. Each server returns the DNS records it currently holds, allowing you to see which servers have received updated records and which are still serving cached data.

Features

• Query 10 DNS record types: A, AAAA, CNAME, MX, NS, TXT, SOA, PTR, CAA, SRV
• 400+ DNS servers across 103 countries
• Real-time response times and server reliability data
• Interactive map view with global server locations
• REST API and GraphQL API for programmatic access
• SEO-friendly shareable lookup URLs

Open Source

This project is open source and available on GitHub. Contributions, bug reports, and feature requests are welcome.

Technology

Built with Node.js, Express, MongoDB, and EJS templates. DNS queries are performed using the dns2 library. The application is deployed via Coolify with automatic deployments on push.