Everybody has open access to obtain information about the domain name registrant and the ownership of a domain by just clicking on certain informative links. Domain name registration information is available and useful for many reasons. It also helps in keeping a track of domain name expiry dates and the start date of registration. Your personal information can be protected through a service called domain privacy. There are many third-party whois online tools that can provide you the details.
The WHOIS Lookup
WHOIS is the utility that is used to check or find out the information about a domain name. This gives not only the information of the registrant but also the administrative contact, billing contact, technical contact, domain expiration date, and original registration date.