The General Data Protection Regulation (GDPR) is a European regulation that has prompted many domain name registrars and registries to remove registrant names and contact information from Whois records. It was adopted on 14 April 2016 and became enforceable on 25 May 2018.
The GDPR has little or no impact on IP network Whois records. It primarily affects domain Whois records.
For several years registrant or contact data in domain Whois records sometimes has been obscured as an added privacy product offered to the registrant, but now with the implementation of GDPR, even though the regulation only applies to EU/EEA residents, some registrars are choosing to not make any distinction—they are withholding details for persons worldwide.