Yes, domain registrant, administrative, and contact (along with several other) information would be publicly available by default.
Contact and registrant information on .com, .net, .org, .info, and .biz domain names are public records in the universally available WHOIS database.
We have no control over this, and a domain name can only be registered with all the required fields of contact information being complete.
Other countries and other domain registration authorities may have other policies.
You can hide registrant, administrative, and contact information by purchasing Whois privacy protection.
This will cost you $8 / year in addition to the domain registration/renewal cost.
You can place an order for Whois privacy protection as a domain add-on from the Client Area or submit the ticket.