Hostgator is one of the web hosting , that offers unlimited domain, so that we can use a single hosting account for multiple domains, until now I use hostgator for about 10 domains and so far so good.

Hosgator , it is more expensive than JustHost that provide free domain or BlueHost who also provides a free domain name and are both providing unlimited domain, but with cheaper prices.  Or it could be in Hostso which provide free domain and can accommodate up to 5 domain if you taking Achieve package for  $ 3/month.

To add an addon domain,firstly we need to login to cpanel then select Addon Domains.  Here I will explain how to add addon domains on Hostgator:

1. Once logged into Cpanel, then select Addon Domains
   

   Addon Domains Hotsgator

2. Then, it will appear as below:
   

   Hostgator Addon Domains

   Fill, New Domain Name with the domain name you want to add, after all of the fields filled in correctly click “Add Domain“.

That simple step to add addon domains on Hostgator, of course this step should be done after you change the name servers to the domain name server hostgator.