Board Thread:Support Requests - Getting Technical/@comment-2031854-20130805021854/@comment-1330470-20130805025641

Wikia does not seem to have any support for external (non .wikia.com) domain names at this point: the only exceptions seem to be Extremely Large Wikis: startrek, wow, et cetera. Unless your wiki is extremely large, your chances are very slim (and your best bet is a Special:Contact/general). Furthermore, I think Wikia would prefer that they, not end users, own any domains associated with their wikis.

You are always free to buy domain names and redirect them to Wikia.com domains: EG if I bought wolfensteinwiki.org and redirected it so that the URL became wolfenstein.wikia.com.