It can be anything! An apex, subdomain, or even a URL.
Results for*.cdn.skype.com.office.zurichairport.myshn.eu
www.*.cdn.skype.com.office.zurichairport.myshn.eucdn.skype.com.office.zurichairport.myshn.euskype.com.office.zurichairport.myshn.eucom.office.zurichairport.myshn.euoffice.zurichairport.myshn.euzurichairport.myshn.eumyshn.eueu