Category:SubDomain of wikipedia.org
Subdomains are added manually. You need to add the Subdomain Page Boilerplate to this page. It's as easy as 1-2-3.
Currently thumbnails work for some subdomains, but not all.
This is a list of available subpages of wikipedia.org in AboutUs.
Pages in category "SubDomain of wikipedia.org"
This category contains only the following page.