It can be anything! An apex, subdomain, or even a URL.
DOMAIN NAME: hostmaster.www.hostmaster.hostmaster.www.cix.bg (hostmaster.www.hostmaster.hostmaster.www.cix.bg)registration status: invalid
DOMAIN NAME: hostmaster.www.hostmaster.hostmaster.www.cix.bg (hostmaster.www.hostmaster.hostmaster.www.cix.bg)
registration status: invalid