What Is a Domain Name? How It Works, in Plain English
Somebody has asked for your domain, and you are not completely sure whether they mean the website, the email address, or the thing you pay for once a year and never think about again.
They mean the name. The bit between the https:// and the first slash. It is the smallest part of your online setup and the one that causes the most confusion, mostly because it gets bundled with hosting, email and site builders and sold as one lump.
Here is the whole thing, without the jargon.
Short answer: A domain name is the human readable address people type to reach your website, such as example.com.au. It stands in for the numeric IP address of the server your site lives on. You licence it from a registrar for a yearly fee, and it is separate from your hosting, which is where the site itself is stored.
What actually happens when someone types your domain name?
The domain is a label that stands in for a numeric address. Type it in and your browser asks a DNS resolver which server holds that name, gets back an IP address, then requests the page from that server. The whole exchange usually finishes in well under a second.
The reason for the label is obvious once you see the alternative. Nobody is going to remember a string of numbers for every business they deal with, and the numbers change whenever a site moves to a different server. The name stays put, and you update what it points at.
That pointing is done with DNS records, and changes to them are not instant everywhere. The reason for the lag is explained in the piece on why DNS changes take hours rather than seconds.
What are the parts of a domain name?
Read a domain from right to left. The last part is the top level extension, such as .au. Anything in front narrows it down: .com.au marks a commercial Australian entity, your business name sits ahead of that, and a prefix like www or shop is a subdomain you create yourself.
| Part | In shop.example.com.au | What it does |
|---|---|---|
| Subdomain | shop | Optional prefix you create and point wherever you like, at no extra cost |
| Your name | example | The part you choose and licence |
| Second level | .com.au | Signals a commercial Australian registrant |
| Country code | .au | Australia |
Subdomains are free and unlimited once you hold the name, which surprises people who assume shop.example.com.au is a second purchase. It is not. It is yours to create.
Is a domain name the same thing as a website or hosting?
No, and keeping them straight saves a lot of confusion later. The domain is the address. Hosting is the building that address points to, where your files and database actually live. You can hold one without the other, move either independently, and buy them from different companies if it suits you.
Keeping them with one provider is usually simpler, because a single login manages both and there is no argument about who is responsible when something breaks. Keeping them apart is a legitimate choice too, particularly if you want the name held somewhere your web developer cannot accidentally cancel it.
Do you own a domain name or licence it?
You licence it. Australian domains are issued as a licence with a term of one to five years, and it continues only while you keep meeting the eligibility rules and paying the renewal. Nobody hands you a title deed. Stop renewing and the name eventually returns to the pool.
The practical consequence is that the details on the registration matter. If the domain is registered to your web designer’s ABN rather than yours, they hold the licence, not you. Check whose name is on it before there is a disagreement rather than after.
Who can register a .com.au domain?
Commercial entities registered to trade in Australia, and holders of an Australian trade mark. You prove it with an ABN, ACN, ARBN or trade mark number, and the name has to relate to your business: your name, an acronym of it, or a match for what you sell. That test applies the whole time you hold it.
The full set of conditions, including what counts as a synonym for your services, is set out in the guide to registering an Australian domain step by step.
What does a domain name cost in Australia?
Australian extensions are the cheap ones. At GoodHost, .com.au, .net.au, .org.au and .au each register and renew at $19 a year, and transferring one in is free. Global extensions cost more, at $41 a year for .com and $43 for .net. That is the entire cost of the name itself.
- The domain fee is separate from hosting. One buys the address, the other buys the space.
- Renewal price matters more than the first year, since you will pay it many more times.
- Transfers of .au names into GoodHost are free, so moving registrar does not mean buying the name again.
A fuller breakdown, including what tends to get bundled in and what does not, sits in the guide to what domains actually cost in Australia. Current pricing for every extension is listed on the GoodHost domains page.
Frequently asked questions
Can I have a domain name without a website?
Yes, and plenty of businesses do. A domain on its own is just a registered name with nothing pointed at it, which is fine if you are holding it for later or using it only for email. It costs the same to hold whether or not a site sits behind it, and you can park it, redirect it, or build on it whenever you are ready.
What happens if I forget to renew my domain?
It stops working first and becomes available to somebody else later. Once the licence lapses, the name usually goes through a grace period where you can still recover it, then a redemption stage that costs more, then back into the pool. Email breaks at the same moment the website does, which is what usually alerts people that something has gone wrong.
Can two businesses have the same domain name?
Not the identical name with the identical extension. Only one holder can licence example.com.au at a time. Two businesses can hold close variations, though, such as example.com.au and example.au, or the same word on different extensions. That is exactly why registering the matching versions of your own name early is worth the modest annual cost.
Do I need a separate domain for my email address?
No. The same domain can carry both your website and your email, which is how most business addresses work. The website is directed by one set of DNS records and the mail by another, so the two are configured separately even though they share a name. Using your own domain for email also looks considerably more credible than a free mailbox.
How long is a domain name registration valid for?
Australian domains are licensed in terms of one, two, three, four or five years, and you renew before the term ends to keep the name. A longer term means fewer renewal reminders to miss. Whichever term you pick, the eligibility rules have to keep being met throughout it, not just at the moment you registered.
The domain search at GoodHost answers two questions at once: whether the name you keep turning over is still free, and whether the ABN you would register it under sits close enough to it to satisfy auDA. If it comes back taken, the domain names guides work through the alternatives, including the shorter .au version and what a transfer involves.