How Domain Names Actually Work
A domain name is the friendly address people type to reach your website, such as yourbrand.co.uk. Behind the scenes, computers do not use names at all — they use numeric IP addresses. The domain name system is the directory that connects the two so that humans can use words while machines use numbers.
Understanding this journey — from typing an address to a page appearing — helps you see why changes are not always instant and where things can go wrong.
From Name to Number
When someone enters your domain, their device asks a chain of servers to translate the name into the IP address of the machine that hosts your site.
- The browser checks its own cache for a recent answer.
- If not found, it asks a resolver, usually run by the internet provider.
- The resolver queries the root and top-level-domain servers to find who is authoritative for your domain.
- Your authoritative name server returns the IP address.
- The browser connects to that address and loads the page.
The Parts of a Domain
Reading a domain from right to left tells you how it is organised, from the broadest category down to your specific brand.
- Top-level domain (TLD): the ending, such as
.co.uk,.comor.org. - Second-level domain: your chosen name, the part you register and own.
- Subdomain: an optional prefix such as
shop.orblog..
Why It Matters to You
Because so many independent servers cooperate to resolve a name, a single misconfigured record can stop your site or email working. Knowing the basics makes it far easier to brief us accurately when something needs changing.
Frequently Asked Questions
Do I own my domain forever once I register it?
No — you lease it for a period, usually one to ten years, and must renew it to keep control.
Can two websites share one domain?
Not the exact same name, but you can run multiple sites on subdomains or subfolders of a single domain.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.