Your company can have any domain name you want, as long as it is not already taken. Each domain name has to be unique, and as the World Wide Web grows, some domain names are becoming hot commodities, with companies offering millions of dollars to gain ownership of a specific name.
Chances are, if your company has a unique name, then getting a domain name named for your company won’t be a problem. Sometimes you do have to adjust, though. For example, www.computerhelpusa.com was taken, so ComputerHelp-USA had to settle on www.computerhelp-usa.com. That is, unless we wanted to make an offer to the owner of www.computerhelp-usa.com — and we didn’t.