Domain Tools
Register your domain
After experimenting with plenty of domain name services, I now use only GoDaddy. Get your hosting package and your domain together - this way your domain name is free. If you already have a domain name, or you are looking for a one-click WordPress installation, check out the WordPress web hosting page for recommendations. But first, check if your name is still available…
Domain name checker
You can do a quick check here, but it will work only for a few times (then the company who owns the rights wants you to sign up). I suggest you go directly to GoDaddy, where you can domain check to your hearts content.