It is possible to see *.<domain> in the lists of hosts. The reason for this is that domains sometimes provide content from dynamic hosts with similar names. There are scenarios in which in every page view there would be a new unique domain for certain hosts.
The logic in the system is as follows: if we detect a series of at least four consecutive digits in a particular part of a host, or similarly for a part of a path, the entire series of digits will be replaced by an asterisk (*).
This is a case where it’s not actually dynamic but is treated as if it is, resulting in *.<domain> displaying.