[users@httpd] IP address used by Apache reverse proxy?

[Osman Zakir]

How do I find the IP address?

Would it be possible to use that IP address with a subdomain name on a virtual 
host configuration?  I want to use the free subdomain I got from 
http://www.subdomain.net.
Subdomain.net - the largest free subdomain network<http://www.subdomain.net/>
Subdomain.net offers you a free subdomain for your website.
www.subdomain.net