This article will tell you how to buy a subdomain and set it up.
A subdomain is part of an existing domain. The existing domain must be registered with 123-reg. If you already have a domain name with us, please use the following instructions to create your subdomain:
Click on the Subdomains option in the Domain namessection.
Enter the quantity of subdomains you require.
Click on the Buy Subdomains Now button.
Type in a name for the new subdomain.
Lastly, click on the Add Subdomain button.