There's no relationship between the .com and .net address for a given domain name. For example, the two domain names, 'yourcompany.com' and 'yourcompany.net,' would need to be registered separately. If you already own the .com domain name, and want to purchase the .net name, visit an accredited registrar. The official listing of these registrars are found at http://www.internic.net/regist.html.
This was first published in June 2001