What is a subdomain?

This answer will explain what a subdomain is and what you can use them for.

A subdomain is a subdivision of a domain, such as "support.123-reg.co.uk" is a subdomain of "123-reg.co.uk" .

For example: If a customer buys a domain with 123-reg, e.g. yourdomain.co.uk, they can set up subdomains, e.g. site1.yourdomain.co.uk or secure.yourdomain.co.uk. This is an excellent way of breaking up the website if you have different regions, products or even languages.


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