The protection of personal information has become increasingly important in recent years. Concepts such as big data, data mining and profiling have taken a prominent place in today’s digital environment. The internet’s naming system forms an important part of this environment and personal data in relation to domain names is collected, disclosed, retrieved and transferred on a daily basis. The main share of the processing activity revolves around the WHOIS public directories, a series of databases managed by registrars and registries containing information related to registered domain names. This information includes the identification and contact information of registrants, such as names, email addresses, phone numbers, physical addresses, and administrative and technical contacts. The protection of this personal data has been a major point of interest recently.