If you have a lot of domain names with different extensions and you would like all of them to open precisely the same site, you may have the site under one of them and redirect the others. There are several approaches to redirect one domain name to another, like the so-called domain parking. When your hosting package allows it, though, it will 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 is hosted, you can still have content for it, set up subdomains, e-mail addresses, and so on., while with a parked domain you can't do any of these things. As an illustration, if you're building localized sites under different country-code domains, you will be able to work on them, but at the same time, people shall be redirected to the main site.