DNS lookup — Free Security Tool

DNS lookup is an Astrina tool for website security and configuration. A, AAAA, MX, NS, TXT, SOA and CAA. It performs a live network query — DNS, WHOIS or TLS — and returns real-time results.

How to use DNS lookup

1. Enter the domain or IP address.
2. Click "Run the check."
3. Review the live network data.
4. Use the results to diagnose or verify your configuration.

What DNS lookup is used for

Professionals working in website security and configuration use this tool to save time and catch errors before they become problems. Common use cases:

• Auditing and quality checks in website security and configuration
• Validating or converting output before deploying
• Debugging issues quickly without switching between multiple tools
• Generating boilerplate output to speed up development

Key features

• Fast: server-side analysis in seconds
• Free for most use cases — no account required for the majority of checks
• Accurate: uses the same techniques as professional SEO and security scanners
• Privacy-friendly: we do not store the content we analyse beyond the session

About this tool

This is part of Astrina's suite of 12 website security and configuration tools. All tools are available at astrina.io/utilities.

Frequently asked questions

Try the DNS lookup now — no account required for most checks, and the result is ready in seconds.