When you have a lot of domains with different extensions and you would like all of them to open exactly the same site, you may have the site under one of them and forward the rest. There are several approaches to forward one domain to another, like the so-called domain parking. When your website hosting package allows it, though, it shall be better if you host each of the domains and create a URL redirect, not a domain redirect. The difference between the two is that while a domain address is hosted, you can still have content for it, create subdomains, e-mail addresses, and so forth., while with a parked domain you are unable to do any of those things. As an illustration, if you're building localized websites under different country-code domain names, you will be able to work on them, but meanwhile, people will be redirected to the main Internet site.