Domain names can contain up to 63 characters, allowing you to register domains that reflect your product names, campaigns, or slogans in most cases.

The valid characters for use in domain names are:

• Any of the letters of the alphabet;  example: abcdefg.com.au
• Any numbers 0 to 9, example: 369.com.au
• You may also use a hyphen (-), example: domain-registration.com.au
• Domain names cannot begin or end with a hyphen
• You can use a combination of numbers, letters and hyphens, example: open24-7.com.au
• You can use multiple instances of hyphens, but not a double hyphen
• Domain names can begin and end in a number, example: 9-5.com.au
• Other forms of punctuation, symbols or accent characters cannot be used.
• The name's length must be between the range 3 and 63 characters

The easiest way to remember most of these rules is to think "LDH"; which stands for Letters, Digits, Hyphens.

Domain names are not case sensitive. This means you can advertise your name in upper or lower case or a combination of both. For example; domainregistration.com.au is the same name as both DomainRegistration.com.au and DOMAINREGISTRATION.COM.AU

While you are able to use 63 characters; bear in mind that the longer a domain name is, the harder it may be to remember; or the more likely it is that it will be incorrectly typed into a browser - it also might be more difficult to include on stationery, such as business cards.

For some further tips to consider when choosing a domain name and information about eligibility for registering different domain extensions, please read our guide.