Domain Names and GDPR
When the General Data Protection Regulation (GDPR) takes effect across the EU on 25 May 2018, large amounts of WHOIS data will no longer be publicly available. WHOIS has to date been a public register of contact information about people controlling domain names (and websites hosted at them), and so has been an important source of information about those who both own and infringe IP.
Source: Eu: Domain Names And Whois Information – Changes Afoot When The Gdpr Comes Into Force – Get Ready!