I want help for open account and get domain name in FREENOM without use my real ip.

Hello, I search person for help. I want to get free domain name in FREENOM without my real ip. But I can't. Every domain I select, it puts me "not available" as information. I need to understand why I can't create a FREENOM domain without getting an error. The goal of this work is to create and use successfully domains in freenom. Thank you