For a number of reasons, you might want to learn who owes a domain name.  When a domain name is registered, the entity that purchases the domain name has to provide contact information.  This information is added into something called the WHOIS database.  The name means “who is”.

The WHOIS database contains information about the domain name like when it was created and when it expires.  It also lists what are the name servers for the domain name.

It also contain contact information.  But, this information is often hidden as a privacy concern.

You can look up this data at a number for websites.