It can be anything! An apex, subdomain, or even a URL.
Results for*.security.live.com.mvc.rev365.shn2.myshn.eu
www.*.security.live.com.mvc.rev365.shn2.myshn.eusecurity.live.com.mvc.rev365.shn2.myshn.eulive.com.mvc.rev365.shn2.myshn.eucom.mvc.rev365.shn2.myshn.eumvc.rev365.shn2.myshn.eurev365.shn2.myshn.eushn2.myshn.eumyshn.eueu