DNS is what connects your domain name to the server where your website lives. Learn how DNS works, what DNS records are, and why it matters for your site.
You type a website name into your browser and the page appears. Simple, right? But your browser does not actually understand website names. It needs a number to find the right server. Something has to translate the name you typed into that number. That something is DNS, the Domain Name System.
If you already understand what a domain name is and how web hosting works, DNS is the piece that connects the two. Without it, your domain would not know where to send visitors, and your hosting would not know which domain is asking.
How does DNS work?
DNS works like a phone book for the internet. When you type a domain name, your browser asks the DNS system to look up the matching server address. Here is how that happens, step by step.
You type a website name. Your browser checks if it already knows the address from a previous visit (that is the local cache). If not, it asks a DNS resolver, which is like a librarian that knows where to look. The resolver checks with nameservers, which are the servers that store the actual records for each domain. The nameserver finds the right address and sends it back. Your browser then connects to the correct server and loads the website.
This entire process usually takes less than a second. DNS explained in simple terms: it turns the name you type into the number your browser needs.
What is a DNS record?
A DNS record is a piece of information stored on a nameserver that tells the internet how to handle requests for your domain. Different types of records serve different purposes.
1. A record
Points your domain name to the server address where your website is stored. This is the most basic and common DNS record.
2. CNAME record
Points one domain name to another domain name. This is often used when you want a subdomain (like blog.yourbrand.com) to load the same content as your main site.
3. MX record
Tells the internet where to deliver emails for your domain. Without an MX record, emails sent to your domain would not reach your inbox.
4. TXT record
Stores text-based information for verification purposes. It is commonly used to verify domain ownership and to set up email authentication.
What is a nameserver?
A nameserver is the server that stores all the DNS records for your domain. When someone types your domain name, the DNS system asks your nameserver for the correct records. Your hosting provider or domain registrar gives you nameserver addresses when you set up your domain. Pointing your domain to the right nameservers is what connects everything together.
What is DNS propagation?
When you update your DNS records, the changes do not take effect everywhere at once. DNS propagation is the time it takes for the updated records to spread across all the DNS servers around the world. This can take anywhere from a few minutes to 48 hours. During this time, some visitors might see the old version of your site while others see the new one. This is normal and temporary.
DNS is one of those things you set up once and rarely think about again, but it is what keeps your domain and your hosting connected at all times. For a more detailed walkthrough, read what is DNS and why does it matter for your website. If you want to understand how propagation timing and TTL values work together, read what is TTL and how does it impact DNS propagation.
Frequently asked questions
Do I need to set up DNS myself?
Most of the time, no. If you are using a website builder that includes hosting and domain registration, DNS is usually configured for you automatically. You only need to touch DNS settings if you are connecting a domain from one provider to hosting from another, or if you are setting up custom email. WEMASY's website builder handles DNS setup when you register or connect your domain, so you do not have to configure anything manually.
What happens if my DNS settings are wrong?
Wrong DNS settings mean your website will not load. Visitors will see an error page or a blank screen because their browser cannot find your server. Incorrect DNS settings are one of the most common reasons a new website does not work after launch. Double-checking your nameserver and A record settings usually fixes the issue.
Why is my website not showing up after I changed my DNS?
This is usually a matter of timing. DNS propagation takes time. After you update your records, it can take anywhere from a few minutes to 48 hours for the changes to reach every DNS server around the world. During this window, some people may see the old site while others see the new one. If it has been more than 48 hours, check your records for errors.
Can DNS affect my website speed?
It can, slightly. The DNS lookup adds a small amount of time to every page load, usually just milliseconds. But if your DNS provider is slow or unreliable, it can add noticeable delay. Choosing a fast DNS provider helps. Learn more about all the factors that affect website speed.
What is the difference between DNS and a domain name?
They are related but different. Your domain name is the name of your website (like yourbrand.com). DNS is the system that translates that name into the server address where your website is stored. The domain is what people type. DNS is how the internet figures out where to send them.
Can I change my DNS provider without changing my domain?
You can, and it is more common than you might think. Your domain and your DNS can be managed by different providers. You just update the nameserver settings on your domain registrar to point to the new DNS provider. Your domain name stays the same, and your website continues to work as long as the DNS records are set up correctly on the new provider.