If you host more than one website, or you want a second domain name to lead somewhere on your existing site, your control panel gives you three different tools for it: a subdomain, an addon domain, and a parked domain. They look similar in the menu, but each one does something different. Picking the wrong one is a common source of confusion, so here's a plain breakdown.
Subdomain
A subdomain is a free extension of a domain you already own, added in front of it: shop.yourdomain.co.ke or blog.yourdomain.com. It shares the same domain registration and the same hosting account as your main site, but it points to its own separate folder, so you can run a completely different section of your site there (a store, a blog, a client portal) without it mixing with your main pages.
- Does not need its own domain registration, since it's part of a domain you already control.
- Usually shares the same SSL certificate as the main domain, or gets covered automatically if you use a wildcard or AutoSSL certificate.
- Best for organizing sections of one project under one brand.
Addon Domain
An addon domain lets you host a second, completely separate domain name on the same hosting account as your main site, for example if you own yourbusiness.co.ke and also yournewbrand.com and want both live at once without buying a second hosting plan. Each addon domain gets its own folder and behaves like an independent website, even though it's billed and managed under one account.
- Requires its own domain registration, which can be registered separately or already owned.
- Needs its own DNS/nameserver setup pointing to your hosting account.
- Best when you're running genuinely separate websites or brands but want to keep hosting costs down.
Check your hosting plan's addon domain limit before you commit to this route. Some entry-level shared hosting plans cap how many addon domains you can host at once.
Parked Domain (Domain Alias)
A parked domain, sometimes called a domain alias, points a second domain name at your existing website so it shows the exact same content as your main domain. Unlike an addon domain, it doesn't get its own folder or its own content. It's mainly used to protect a brand by owning close variations of a name, or to let visitors reach the same site through more than one domain.
- Requires its own domain registration, same as an addon domain.
- Shows identical content to your main site under a different domain name in the browser's address bar.
- Best for brand protection or catching visitors who type a similar domain name.
Running the same content live on two domain names can hurt your search rankings through duplicate content. If SEO matters to you, set the parked domain up as a redirect to your main domain instead of leaving it live as an identical copy.
Which One Do You Need?
- Organizing a section of your existing site (store, blog, app): use a subdomain.
- Hosting a completely different website or business on the same account: use an addon domain.
- Making sure a second domain name shows the same site as your main one: use a parked domain.
Both cPanel and DirectAdmin support all three, though the setup screens are named a little differently between the two. For the exact click-by-click steps, see the addon domain setup guide and the parked domain setup guide.