It can be anything! An apex, subdomain, or even a URL.
Results for*.c3scs.jp.msn.com.office.o365rp.fcc.myshn.eu
www.*.c3scs.jp.msn.com.office.o365rp.fcc.myshn.euc3scs.jp.msn.com.office.o365rp.fcc.myshn.eujp.msn.com.office.o365rp.fcc.myshn.eumsn.com.office.o365rp.fcc.myshn.eucom.office.o365rp.fcc.myshn.euoffice.o365rp.fcc.myshn.euo365rp.fcc.myshn.eufcc.myshn.eumyshn.eueu