WHOIS Lookup - Search Domain Name Records
What's in the WHOIS?
All registered domain names have an entry in a central database containing the personal contact information of the domain registrant. This database is known as the WHOIS database, and it is required by ICANN that all domains have valid information for WHOIS search.
It is important to have valid information in the WHOIS lookup because it is needed to conduct domain name transfers, it is used by law enforcement for criminal investigations, and by the public to determine when a domain expires and how to contact the domain name owner.
So can anyone see my contact details?
Yes. It is required by ICANN that all domains have valid contact information