It can be anything! An apex, subdomain, or even a URL.
Results forteams.cdn.office.net.office.o365.phoenixprod.myshn.eu
www.teams.cdn.office.net.office.o365.phoenixprod.myshn.eucdn.office.net.office.o365.phoenixprod.myshn.euoffice.net.office.o365.phoenixprod.myshn.eunet.office.o365.phoenixprod.myshn.euoffice.o365.phoenixprod.myshn.euo365.phoenixprod.myshn.euphoenixprod.myshn.eumyshn.eueu