It can be anything! An apex, subdomain, or even a URL.
Results forhostmaster.hostmaster.hostmaster.www.superset.clockrepair.biz
www.hostmaster.hostmaster.hostmaster.www.superset.clockrepair.bizhostmaster.hostmaster.www.superset.clockrepair.bizhostmaster.www.superset.clockrepair.bizwww.superset.clockrepair.bizsuperset.clockrepair.bizclockrepair.bizbiz