When you have several domains with different extensions and you would like all of them to open exactly the same Internet site, you could have the website under one of them and redirect the rest. There are a number of approaches to forward one Internet domain name to another, among them the so-called domain parking. When your website hosting package allows it, though, it'll be better if you host each of the domains and set up a URL redirect, not a domain redirect. The difference between the two is that while a domain is hosted, you could still have content for it, set up subdomains, email addresses, and so forth., while with a parked domain it's not possible to do any of those things. For example, if you're building localized sites under different country-code domain names, you shall be able to work on them, but at the same time, people shall be forwarded to the main website.