SSLFREE

DNS Lookup Tool

Enter a domain name to check its DNS records.

Understanding DNS Lookup

The Domain Name System (DNS) is the phonebook of the internet. It translates human-readable domain names (like sslfree.io) into machine-readable IP addresses (like 192.0.2.1). Our DNS Lookup tool allows you to query the DNS records for any domain, providing essential information about its configuration and how it connects to the internet.

Why Use a DNS Lookup Tool?

This tool is indispensable for web developers, system administrators, and anyone needing to diagnose website issues or verify domain configurations.

Troubleshoot Website Issues

Quickly check if a domain's A or AAAA record is pointing to the correct IP address, a common cause of website connection problems.

Verify Email Configuration

Use the MX record lookup to ensure that a domain's mail servers are set up correctly to send and receive emails.

Confirm SSL/Domain Verification

Check TXT records to confirm that verification codes for services like Google Workspace or for SSL certificates have been added correctly.

Understand Domain Aliases

A CNAME lookup can show if a subdomain is an alias for another domain, which is common for services hosted on external platforms.

Common DNS Record Types You Can Check

Our tool can query for all major DNS record types. Here are some of the most common ones:

  • A Address Record Points a domain to an IPv4 address.
  • AAAA IPv6 Address Record Points a domain to a more modern IPv6 address.
  • MX Mail Exchange Record Specifies the mail servers for the domain.
  • TXT Text Record Used to store text-based information for external sources.
  • CNAME Canonical Name Forwards one domain or subdomain to another domain.

Frequently Asked Questions

A DNS (Domain Name System) record is a database entry that maps a human-readable domain name (like www.example.com) to a machine-readable IP address (like 192.168.1.1). There are many types of records, such as A, AAAA, CNAME, MX, and TXT, each serving a different purpose.

Changes to DNS records can take some time to propagate across the internet, a process that can last anywhere from a few minutes to 48 hours. If you've just added or changed a record, please be patient. You can use this tool to periodically check if the changes are live.

An A record maps a domain directly to a specific IP address (e.g., example.com -> 192.168.1.1). A CNAME record (Canonical Name) maps a domain or subdomain as an alias to another domain (e.g., www.example.com -> example.com). You cannot have a CNAME record for a root domain.

If you are using DNS-based verification to get an SSL certificate, you will be asked to add a specific TXT record to your domain's DNS settings. After adding it, you can use our tool to perform a TXT record lookup on your domain to confirm that the record is visible on the internet before proceeding with the final verification step.