Will the contact information I enter for my domain registration remain confidential?
No, it will not. Your domain contact information must be made publicly available via WHOIS.
WHOIS databases contain nameserver, registrar, and in some cases, full contact information about a domain name.
Each registrar must maintain a WHOIS database containing all contact information for the domains they 'host'.
A central registry WHOIS database is maintained by the InterNIC. This database contains only registrar and nameserver information for all .com, .net and .org domains.