What Is a DNS Lookup?
When you type a website address into your browser, your device does not understand the name itself. It needs a number, called an IP address, to find the right server. DNS, the Domain Name System, is the service that connects the two. You can think of it as the internet’s address book.
A DNS lookup asks that address book what it knows about a domain. This free DNS lookup tool shows you the records stored for any domain name, so you can see where a website points, which servers handle its email, and more. It is one of many free website helpers on Tool Hub Zone, and you can find similar tools in our SEO tools section.
How to Use the DNS Lookup Tool
- Type a domain name into the box above, for example example.com.
- Choose a record type if the tool gives you the option.
- Run the lookup.
- Read the records that appear in the results.
Enter only the domain name. You do not need to add https:// or any page path after it.
Common DNS Record Types
- A record: Connects a domain name to an IPv4 address, such as the server where your website is hosted.
- AAAA record: Does the same job for the newer IPv6 address format.
- CNAME record: Points one name to another name. It is often used for subdomains like www.
- MX record: Tells the world which mail servers receive email for your domain.
- TXT record: Holds text information. It is commonly used for domain verification and email security settings such as SPF.
- NS record: Names the servers that hold the official DNS information for the domain.
When a DNS Lookup Is Useful
After moving to a new host. Check that your A record points to the new server’s address.
When email stops working. A wrong or missing MX record is a very common cause of lost or bounced messages.
While verifying a domain. Services such as search engines and email platforms often ask you to add a TXT record, and a lookup shows whether it is live.
Before buying a domain. Seeing how a domain is currently set up can tell you whether it is in use. For ownership and expiry details, try our Whois Lookup.
When a site will not load. A quick check can show whether the problem lies in the DNS settings or somewhere else.
Why DNS Changes Take Time
If you edit a DNS record, the change does not always appear everywhere right away. DNS information is stored temporarily by servers around the world, and each record has a time-to-live (TTL) value that says how long it may be kept. Updates can take from a few minutes to a day or more to spread fully. If you have just made a change, wait a while and check again before you assume something went wrong.
Other Tools That Help
DNS is only one part of a healthy website. These tools from our collection are good companions:
- The SSL Checker confirms that your security certificate is valid and when it expires.
- The Redirect Checker follows a URL and shows every redirect along the way.
- The HTTP Header Checker shows the status code and headers a server sends back.
- The Page Speed Checker tests how fast your pages load.
Frequently Asked Questions
Is the DNS lookup free?
Yes. It is free to use, and you do not need to sign up.
Can I look up any domain?
You can check the public DNS records of most domains. Private or internal records are not visible to the public.
Why do I see no result for a record type?
The domain may simply not have that type of record. For example, a domain without email set up may have no MX record.
Does a lookup change anything on my domain?
No. It only reads public information and does not make any changes.
How can I update my DNS records?
You need to log in to your domain registrar or DNS host and edit the records there. This tool only shows what is currently published.
