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Free DNS Lookup Tool

Check DNS records for any domain. View A, AAAA, MX, TXT, CNAME, and NS records for troubleshooting and verification.

Last Updated: 15 Jan 2026

What is DNS Lookup?

DNS (Domain Name System) lookup is the process of querying DNS servers to retrieve DNS records for a domain name. It translates human-readable domain names (like example.com) into IP addresses and retrieves various DNS records that control how domains work, including A records (IPv4 addresses), AAAA records (IPv6 addresses), MX records (mail servers), TXT records (text data), CNAME records (aliases), and NS records (name servers).

DNS lookup tools help you verify DNS configuration, troubleshoot domain issues, check email server settings, verify SSL/TLS records, and understand how your domain is configured. They're essential for website management, email setup, and domain troubleshooting.

Why Use Our Free DNS Lookup Tool?

DNS Verification

Verify DNS records for any domain instantly. Check A, AAAA, MX, TXT, CNAME, and NS records to ensure proper DNS configuration.

Troubleshooting

Troubleshoot domain and email issues by checking DNS records. Identify misconfigurations, propagation issues, or DNS errors quickly.

Multiple Record Types

Query various DNS record types including A, AAAA, MX, TXT, CNAME, and NS records. Get comprehensive DNS information for any domain.

Common Use Cases for DNS Lookup

Website Management

Domain Verification
Verify DNS records after domain changes or migrations. Check that A records point to correct IP addresses and domains resolve properly.
SSL/TLS Verification
Check TXT records for SSL certificate verification (like Let's Encrypt DNS-01 challenges) or domain ownership verification.
CDN Configuration
Verify CNAME records for CDN (Content Delivery Network) configuration. Check that domains point to correct CDN endpoints.

Email & Security

Email Server Setup
Check MX records to verify email server configuration. Ensure mail servers are correctly configured for email delivery.
SPF/DKIM/DMARC Records
Verify TXT records for email security (SPF, DKIM, DMARC). Check that email authentication records are properly configured.
Domain Troubleshooting
Troubleshoot domain issues by checking DNS records. Identify DNS propagation problems, misconfigurations, or DNS errors.

Common DNS Record Types Explained

A Record

Maps domain name to IPv4 address. Points your domain to the server IP address where your website is hosted.

Example: example.com → 192.0.2.1

AAAA Record

Maps domain name to IPv6 address. Similar to A record but for IPv6 addresses (newer IP protocol).

Example: example.com → 2001:0db8::1

MX Record

Specifies mail servers for email delivery. Points to servers that handle email for your domain.

Example: mail.example.com (priority 10)

CNAME Record

Creates alias pointing to another domain name. Used for subdomains or CDN configuration.

Example: www.example.com → example.com

TXT Record

Stores text data for various purposes. Used for SPF, DKIM, DMARC, domain verification, and other text-based DNS data.

Example: SPF, domain verification strings

NS Record

Specifies authoritative name servers for the domain. Points to DNS servers that manage your domain's DNS records.

Example: ns1.example.com, ns2.example.com

DNS Troubleshooting Guide

Common DNS Issues

• DNS propagation delays: DNS changes can take 24-48 hours to propagate globally
• Incorrect A records: Domain pointing to wrong IP address
• Missing MX records: Email not working due to missing or incorrect MX records
• CNAME conflicts: CNAME records can't coexist with other record types
• TTL issues: Long TTL values delay DNS changes from taking effect

How to Fix DNS Issues

Check current DNS records using DNS lookup tool
Verify records match expected configuration
Update incorrect records in your DNS provider's control panel
Reduce TTL before making changes for faster propagation
Wait for DNS propagation (check from different locations)
Verify changes using DNS lookup tool again

Frequently Asked Questions

What is DNS lookup?

DNS lookup queries Domain Name System servers to retrieve DNS records for a domain, showing IP addresses, mail servers, and other DNS configuration details. It translates domain names to IP addresses and retrieves various DNS record types.

How long do DNS changes take?

DNS changes typically take 24-48 hours to propagate globally, though they can take effect faster (minutes to hours) depending on TTL values and DNS caching. Lower TTL values before changes can speed up propagation.

What's the difference between A and CNAME records?

A records point directly to IP addresses, while CNAME records point to other domain names (aliases). CNAME records can't coexist with other record types on the same name, while A records can.

Why check DNS records?

Checking DNS records helps verify domain configuration, troubleshoot website and email issues, verify SSL certificates, check email security (SPF/DKIM), and ensure domains are properly configured for optimal performance.