There is no requirement to register most domain extensions (TLDs) such as .com, .net, .org, .website, .coffee, etc. However, there are eligibility requirement need to be fulfilled for certain type of domain extensions (TLDs) like country code TLDs and new domain extensions (new TLDs) such as .co.id, .id, .com.au, .sydney, .com.sg, .dentist, .lawyer, etc in order to successfully register the domains.