When you have a number of domains with different extensions and you want all of them to open exactly the same Internet site, you could have the website under one of them and redirect all the rest. There are a number of methods to forward one domain name to another, like the so-called domain parking. When your web 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 name is hosted, you may still have content for it, create subdomains, e-mail addresses, and many others., while with a parked domain you are unable to do any of those things. For example, if you're building localized websites under various country-code domains, you'll be able to work on them, but meanwhile, visitors shall be forwarded to the main website.