Multiple discussion lists - mult subdomains reqd?

I’ve searched through the forums here and the support wiki but nothing talks about having multiple lists in the same sub-domain.

In short, if I set up a sub-domain such as “”, can I associate multiple discussion lists with that same sub-domain? If so, can users of one discussion list see the archives of the other lists from the home page of the same discussion lists? Can they even see the other discussion lists that are available?

Thanks in advance for your help!